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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

x           QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2011.

o              TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                 to                 .

Commission File Number 001-32472

TGC INDUSTRIES, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code:  (972) 881-1099

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes  x   No  o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to be submit and post such files).  Yes  x   No  o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company.  See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes  o  No  x

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

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PART I — FINANCIAL INFORMATION

ITEM 1.  FINANCIAL STATEMENTS.

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TGC INDUSTRIES, INC.

CONSOLIDATED BALANCE SHEETS

See Notes to Financial Statements

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TGC INDUSTRIES, INC.

CONSOLIDATED BALANCE SHEETS — CONTINUED

See Notes to Financial Statements

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TGC INDUSTRIES, INC.

CONSOLIDATED STATEMENTS OF EARNINGS (Unaudited)

See Notes to Consolidated Financial Statements

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TGC INDUSTRIES, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)

See Notes to Consolidated Financial Statements

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TGC INDUSTRIES, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

June 30, 2011

NOTE A

BASIS OF PRESENTATION

The accompanying financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America for interim financial information and the instructions to Form 10-Q.  Accordingly, they do not include all of the financial information and footnotes required by generally accepted accounting principles for complete financial statements.  References to “we,” “us,” “our,” “its,” or the “Company” refer to TGC Industries, Inc. and our subsidiaries.

In connection with the preparation of these consolidated financial statements, the Company evaluated subsequent events after the balance sheet date of June 30, 2011, through August 9, 2011, the date these consolidated financial statements were issued.

REVENUE RECOGNITION

Seismic Surveys

The Company provides seismic data acquisition survey services to its customers under general service agreements which define certain obligations for the Company and for its customers.  A supplemental agreement setting forth the terms of a specific project, which may be cancelled by either party upon 30 days’ advance written notice, is entered into for every project.  These supplemental agreements are either “turnkey” agreements providing for a fixed fee to be paid for each unit of seismic data acquired or “term” agreements providing for a fixed hourly, daily, or monthly fee during the term of the project.  The duration of these projects will vary from a few days to several months.  The Company recognizes revenue when services are performed under both types of agreements.  Services are defined as the commencement of data acquisition.  Under turnkey agreements, the total number of units of seismic data to be gathered is set forth in the agreement, and revenue is recognized as services are performed on a per unit of seismic data acquired rate.  Under term agreements, revenue is recognized as services are performed based on the time worked rate provided in the term agreement.  Under both turnkey and term agreements, cost of earned revenue is recognized by multiplying total estimated agreement cost by the percentage-of-completion of the agreement.  The excess of that amount over the cost of earned revenue reported in prior periods is recognized as cost of earned revenue for the period.  Agreements are not segmented or combined for purposes of calculating percentage of completion.  The asset “Cost and estimated earnings in excess of billings on uncompleted contracts” represents cost incurred on turnkey agreements in excess of billings on those agreements.  The liability “Billings in excess of costs and estimated earnings on uncompleted contracts” represents billings on turnkey agreements in excess of cost on those agreements.

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TGC INDUSTRIES, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED

June 30, 2011

NOTE A — continued

RECENT ACCOUNTING PRONOUNCEMENTS

In July 2010, the FASB issued accounting standard update (“ASU”) 2010-20, “Receivables — Disclosures about the Credit Quality of Financing Receivables and the Allowance for Credit Losses”.  ASU 2010-20 amends Topic 310 to improve the disclosures that an entity provides about the credit quality of its financing receivables and the related allowance for credit losses.  As a result of these amendments, an entity is required to disaggregate by portfolio segment or class certain existing disclosures and provide new disclosures about certain financing receivables and related allowance for credit losses. These provisions are effective for interim and annual reporting periods ending on or after December 15, 2010.  The adoption of this standard did not have a significant impact on our financial statements or disclosures.

NOTE B — MANAGEMENT PRESENTATION

In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation of financial position, results of operations, and changes in financial position have been included.  The results of the interim periods are not necessarily indicative of results to be expected for the entire year.  For further information, refer to the financial statements and the footnotes thereto included in the Company’s Annual Report for the year ended December 31, 2010, filed on Form 10-K.

NOTE C — EARNINGS PER SHARE

Basic earnings per common share are based upon the weighted average number of shares of common stock (“common shares”) outstanding.  Diluted earnings per share are based upon the weighted average number of common shares outstanding and, when dilutive, common shares issuable for stock options, warrants, and convertible securities.  All earnings per common share for the three-month and six-month periods ended June 30, 2010 have been adjusted for the 5% stock dividend paid on May 14, 2010, to shareholders of record as of April 30, 2010.

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TGC INDUSTRIES, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED

June 30, 2011

NOTE C - continued

The following is a reconciliation of net income (loss) and weighted average common shares outstanding for purposes of calculating basic and diluted net income (loss) per share:

Outstanding and exercisable options to purchase 75,885 and 99,706 shares of the common shares were not included in the computation of diluted earnings per share as the effect would have been anti-dilutive for the three and six months ended June 30, 2010 due to the net losses.

NOTE D — DIVIDENDS

On April 20, 2010, the Company declared a five percent (5%) stock dividend on its outstanding common shares.  The 5% stock dividend was paid on May 14, 2010, to shareholders of record as of April 30, 2010.   Cash in lieu of fractional shares in the total amount of $431 was paid to shareholders based on the last sales price of the Company’s common shares on the record date.  No dividends have been declared or paid in 2011.

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TGC INDUSTRIES, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED

June 30, 2011

NOTE E — INCOME TAXES

Deferred income taxes reflect the impact of temporary differences between the amounts of assets and liabilities recognized for financial reporting purposes and such amounts recognized for tax purposes.  In addition, the Company paid, during the first six months of 2011, federal and various state estimated income taxes for tax year 2011, as well as various state income taxes for tax year 2010.

NOTE F — SHARE-BASED COMPENSATION

The Company accounts for share-based compensation awards and for unvested awards outstanding using the modified prospective application method.  Accordingly, we recognized the fair value of the share-based compensation awards as wages in the Consolidated Statements of Earnings on a straight-line basis over the vesting period.  We have recognized compensation expense, relative to share-based awards, in wages in the Consolidated Statements of Earnings of approximately $113,000 and $149,000, less than $0.01 per share, for the three months ended June 30, 2011, and 2010, and approximately $227,000 and $274,000, or approximately $0.01 per share, for the six months ended June 30, 2011, and 2010, respectively.

As of June 30, 2011, there was approximately $190,000 of unrecognized compensation expense related to our two share-based compensation plans which the Company expects to recognize over a period of three years.

NOTE G — ENTRY INTO A MATERIAL DEFINITIVE AGREEMENT

On March 21, 2011, we disclosed that on March 20, 2011, the Company and Dawson Geophysical Company, a Texas corporation, and 6446 Acquisition Corp., a Texas corporation and a wholly-owned subsidiary of Dawson, entered into an Agreement and Plan of Merger pursuant to which 6446 Acquisition will merge with and into the Company, with the Company continuing after the merger as the surviving entity and a wholly-owned subsidiary of Dawson.

Under the terms of the merger agreement, so long as two business days prior to the earlier of (1) a meeting of the Company’s shareholders or (2) a special meeting of Dawson’s shareholders, the Average Price (as described below) of Dawson’s common stock is equal to or greater than $32.54 but less than or equal to $52.54, at the effective time of the merger, each issued and outstanding common share of the Company (other than common shares owned by the Company, any wholly-owned subsidiary of the Company, Dawson, or 6446 Acquisition) will be automatically converted into the right to receive 0.188 shares of Dawson common stock.  If the Average Price is not within the parameters outlined above, the Company and Dawson will seek, in good faith to negotiate a new exchange ratio that is acceptable to both parties, but subject to each party’s right to terminate the merger agreement if the Company and Dawson are not able to agree on a new exchange ratio within two business days after the second business day prior to the earlier of (1) a meeting of the Company’s shareholders or (2) a special meeting of Dawson’s shareholders.  The “Average Price” means the average of the volume weighted average of the trading price of Dawson common stock for the 10 consecutive trading days ending on the trading day that is two business days prior to the  earlier of (1) a meeting of the Company’s shareholders or (2) a special meeting of Dawson’s shareholders.

The respective boards of directors of the Company, Dawson, and 6446 Acquisition have approved the merger agreement.  The board of directors of the Company has recommended that the Company’s shareholders approve the merger agreement, subject to Section 7.3 of the merger agreement.  The board of directors of Dawson has recommended that Dawson’s shareholders approve the issuance of shares of Dawson common stock to the shareholders of the Company in accordance with the merger agreement.

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TGC INDUSTRIES, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED

June 30, 2011

NOTE G — continued

It is expected that the merger will qualify as a tax-free reorganization for U.S. federal income tax purposes, so that, in general, none of the shareholders of the Company, Dawson or 6446 Acquisition will recognize any gain or loss in the transaction, except that the Company’s shareholders will generally recognize gain or loss with respect to cash received in lieu of fractional shares of Dawson common stock.

In connection with the merger agreement, common shares beneficially owned by the named executive officers and directors of the Company representing, in the aggregate, approximately 28.73% of the outstanding common shares on March 20, 2011 are subject to voting agreements with Dawson.  Under the shareholder voting agreements, those officers and directors and other persons directing the voting of such common shares have agreed, among other things: (1) to vote their common shares in favor of adoption of the merger agreement at the meeting of the Company shareholders to be held to vote on the merger agreement; and (2) not to sell, transfer, or gift any of their common shares prior to the consummation of the merger, except under limited circumstances, including the Company’s board of directors making an adverse recommendation as described in the merger agreement.

NOTE H — COMMITMENTS AND CONTINGENCIES

On July 25, 2011, the Company entered into an agreement to purchase a new 5,000 channel GSR wireless seismic recording system and related equipment for a total purchase price of approximately $6,300,000 to be paid with a 5% note from a commercial bank.  We received delivery of substantially all of the equipment in July.

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ITEM 2.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS.

The following discussion and analysis should be read in conjunction with our financial statements and related notes thereto included elsewhere in this Form 10-Q. Portions of this document that are not statements of historical or current fact are forward-looking statements that involve risk and uncertainties, such as statements of our plans, objectives, expectations, and intentions. The cautionary statements made in this Form 10-Q should be read as applying to all related forward-looking statements wherever they appear in this Form 10-Q. Our actual results could differ materially from those anticipated in the forward-looking statements. Factors that could cause our actual results to differ materially from anticipated results include those discussed in Part II, Item 1A. “RISK FACTORS.”

Forward Looking Statements

This report includes “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended.  All statements other than statements of historical fact included in this report regarding the Company’s strategies and plans for growth are forward-looking statements.  These forward-looking statements are often characterized by the terms “may,” “will,” “anticipate,” “estimate,” “expect,” “project,” “intend,” “plan,” “believe,” “target,” and other words and terms of similar meanings and do not reflect historical facts.  Although management believes that the expectations reflected in such forward-looking statements are reasonable, it can give no assurance that such expectations will prove to have been correct.  Important factors that could cause actual results to differ materially from such expectations are disclosed in the Company’s Securities and Exchange Commission filings, and include, but are not limited to, the dependence upon energy industry spending for seismic services, the unpredictable nature of forecasting weather, the potential for contract delay or cancellation, the potential for fluctuations in oil and gas prices, the availability of capital resources, and the current economic downturn which could adversely affect our revenues and cash flow if our customers, and/or potential customers, become unable to pay, or must delay payment of,  amounts owing to the Company because such customers are not successful in generating revenues or are precluded from securing necessary financing.  The forward-looking statements contained herein reflect the current views of the Company’s management, and the Company assumes no obligation to update the forward-looking statements or to update the reasons actual results could differ from those contemplated by such forward-looking statements.

Executive Overview

TGC Industries, Inc. is a Texas corporation, and with its wholly-owned subsidiary, Eagle Canada, Inc., a Delaware corporation, (collectively “TGC” or the “Company”), is primarily engaged in the geophysical service business of conducting Three-D (“3-D”) surveys for clients in the oil and gas business.  TGC’s principal business office is located at 101 E. Park Blvd., Suite 955, Plano, Texas 75074 (Telephone: 972-881-1099).  TGC’s internet address is www.tgcseismic.com.  TGC makes available free of charge on its website its annual reports on Form 10-K, quarterly reports on Form 10-Q, and current reports on Form 8-K as soon as reasonably practicable after filing with, or furnishing such information to, the Securities and Exchange Commission.

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The Company is a leading provider of seismic data acquisition services throughout the continental United States and Canada.  We supply seismic data to companies engaged in the domestic exploration and development of oil and natural gas on land and in land-to-water transition areas. Our customers rely on seismic data to identify areas where subsurface conditions are favorable for the accumulation of existing hydrocarbons, to optimize the development and production of hydrocarbon reservoirs, to better delineate existing oil and natural gas fields, and to augment reservoir management techniques.  We operated seven seismic crews and added an eighth seismic acquisition crew in the lower 48 states during the second quarter of 2011.  As expected, the second quarter was impacted by the seasonal slowdown in Canada that resulted from the spring thaw, where we wound down activities with essentially no crews operating there for most of the quarter.  However, toward the end of the second quarter, we were awarded new business in Canada and accordingly activated two crews there.  Due to the seasonality of the Canadian market, the second quarter is usually the weakest quarter for activity in Canada, and we expect increasing levels of seismic activity in that region for the next three quarters, beginning with the third quarter of 2011.

We acquire geophysical data using the latest in 3-D survey techniques. We introduce acoustic energy into the ground by using vibration equipment or dynamite detonation, depending on the surface terrain and subsurface requirements. The reflected energy, or echoes, is received through geophones, converted into a digital signal at a multi-channel recording unit, and then transmitted to a central recording vehicle. Subsurface requirements dictate the number of channels necessary to perform our services. With our state-of-the-art seismic equipment, including computer technology and multiple channels, we acquire, on a cost effective basis, immense volumes of seismic data that when processed and interpreted produce more precise images of the earth’s subsurface. Our customers then use our seismic data to generate 3-D geologic models that help reduce finding costs and improve recovery rates from existing wells.

We provide our seismic data acquisition services primarily to major and independent domestic onshore oil and natural gas exploration and development companies for use in the onshore drilling and production of oil and natural gas in the continental United States and Canada. The main factors influencing demand for seismic data acquisition services in our industry are the level of drilling activity by oil and natural gas companies and the sizes of such companies’ exploration and development budgets, which, in turn, depend largely on current and anticipated future crude oil and natural gas prices and depletion rates.

The services we provide to our customers vary according to the size and needs of each customer. Our services are marketed by supervisory and executive personnel who contact customers to determine their needs and respond to customer inquiries regarding the availability of crews. Contacts are based principally upon professional relationships developed over a number of years. There are a number of consultants in the oil and natural gas industry who process and interpret seismic data for oil and natural gas companies. These consultants can have an influence in determining which company their customers use to acquire seismic data.

The acquisition of seismic data for the oil and natural gas industry is a highly competitive business.  There are approximately 64 seismic crews currently operating in the continental United States and Canada. Contracts for such services generally are awarded on the basis of price quotations, crew experience, and the availability of crews to perform in a timely manner, although factors other than price, such as crew safety performance history, and technological and operational expertise, are often determinative. Our competitors include companies with financial resources that are significantly greater than our own as well as companies of comparable and smaller size. Our primary competitors are Dawson Geophysical Company, Geo Kinetics, Inc., and CGG-Veritas.  These competitors are publicly-traded companies with long operating histories which field numerous crews and work in a number of different regions and terrain.  In addition to the previously named companies, we also compete for projects from time to time with smaller seismic companies which operate in local markets with only one or two crews and often specialize in specific regions or type of operations.  We believe that our long-term industry

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expertise, the customer relationships developed over our history, and our financial stability give us an advantage over most of our competitors in the industry.

Results of Operations

The Company’s business is subject to seasonal variations; thus the results of operations for the three and six months ended June 30, 2011, are not necessarily indicative of a full year’s results.

Six Months Ended June 30, 2011, Compared to Six Months Ended June 30, 2010 (Unaudited)

Revenues.  Our revenues were $80,462,829 for the six months ended June 30, 2011, compared to $52,774,625 for the same period of 2010, an increase of 52.5%.  This increase in revenues was attributable to continued improvement in the North American land seismic acquisition market, our operation of seven seismic crews (as compared to six seismic crews in the U.S. during the six months ended June 30, 2010), and the addition during the second quarter of 2011 of our eighth seismic crew in the U.S.

Cost of services.  Our cost of services was $56,219,924 for the six months ended June 30, 2011, compared to $41,921,690 for the same period of 2010, an increase of 34.1%.  This increase was primarily attributable to strong revenue growth during the first half of 2011, better contract terms with the improvement in the North American land seismic acquisition market, efficiencies in operations gained through the utilization of wireless seismic recording systems, our operation of seven seismic crews (as compared to six seismic crews in the U.S. during the six months ended June 30, 2010), and the addition during the second quarter of 2011 of our eighth seismic crew in the U.S.  As a percentage of revenues, cost of services was 69.9% for the six months ended June 30, 2011, compared to 79.4% for the same period of 2010.

Selling, general, and administrative expenses.  SG&A expenses were $4,773,453 for the six months ended June 30, 2011, compared to $3,429,310 for the same period of 2010, an increase of 39.2%.  This increase was primarily attributable to $1,111,535 of transaction costs related to the proposed merger transaction with Dawson Geophysical Company.  SG&A expense as a percentage of revenues was 5.9% for the six months ended June 30, 2011, compared with 6.5% for the same period of 2010.

Depreciation and amortization expense.  Depreciation and amortization expense was $9,241,426 for the six months ended June 30, 2011, compared to $7,656,931 for the same period of 2010, an increase of 20.7% resulting from the purchase of additional GSR wireless seismic recording systems and related equipment and five new vibration vehicles.  Depreciation and amortization expense as a percentage of revenues was 11.5% for the six months ended June 30, 2011, compared to 14.5% for the same period of 2010.

Income and loss from operations.  Income from operations was $10,228,026, among the highest in Company history, compared to a loss from operations of $233,306 for the same period of 2010.  The increase was attributable to several factors including strengthening demand, better contract terms with the improvement in the North American land seismic acquisition market, efficiencies in operations gained through the utilization of wireless seismic recording systems, and our operation of seven seismic crews (as compared to six seismic crews in the U.S. during the six months ended June 30, 2010), and the addition during the second quarter of 2011 of our eighth seismic crew in the U.S.  EBITDA increased $12,045,827 to $19,469,452 for the six months ended June 30, 2011, from $7,423,625 for the same period of 2010, an increase of 162.3%.  This increase was a result of factors discussed above.  For a definition of EBITDA, a reconciliation of EBITDA to net income, and discussion of EBITDA, refer to the section entitled “EBITDA” found below.

Interest expense.  Interest expense was $382,696 for the six months ended June 30, 2011, compared to $429,814 for the same period of 2010, a decrease of 11.0%.  This decrease was primarily attributable to the reduction of principal balances on notes and lease obligations.

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Income tax expense.  Income tax expense was $3,494,821 for the six months ended June 30, 2011, compared to an income tax benefit of $3,021 for the same period of 2010.  The effective tax rate was 35.5% for the six months ended June 30, 2011, compared to an effective tax benefit for the six months ended June 30, 2010, which tax benefit was minimal due to state margin taxes and permanent tax differences.  See Note E of Notes to Financial Statements in Item 1.

Three Months Ended June 30, 2011, Compared to Three Months Ended June 30, 2010 (Unaudited)

Revenues.  Our revenues were $30,215,516 for the three months ended June 30, 2011, compared to $22,480,784 for the same period of 2010, an increase of 34.4% reflecting the continuing strength in the U.S. land seismic market.  We operated seven seismic crews (as compared to six seismic crews in the U.S. during the three months ended June 30, 2010), and added our eighth seismic crew in the U.S. during the second quarter of 2011.  The Company’s Canadian operations did not contribute materially to the overall results of this year’s or last year’s second quarter.

Cost of services.  Our cost of services was $21,950,230 for the three months ended June 30, 2011, compared to $18,335,659 for the same period of 2010, an increase of 19.7%.  This increase was primarily attributable to the continuing strength in the U.S. land seismic market, efficiencies in operations gained through the utilization of wireless seismic recording systems, and our operation of additional seismic acquisition crews as discussed above.  As a percentage of revenues, cost of services was 72.6% for the three months ended June 30, 2011, compared to 81.6% for the same period of 2010.

Selling, general, and administrative expenses.  SG&A expenses were $2,272,892 for the three months ended June 30, 2011, compared to $1,744,273 for the same period of 2010, an increase of 30.3%.  This increase was due to $528,000 of transaction costs related to the proposed merger transaction with Dawson Geophysical Company.  SG&A expense as a percentage of revenues was 7.5% for the three months ended June 30, 2011, compared with 7.8% for the same period of 2010.

Depreciation and amortization expense.  Depreciation and amortization expense was $4,778,547 for the three months ended June 30, 2011, compared to $3,789,217 for the same period of 2010, an increase of 26.1%.  This increase was primarily attributable to additions of seismic recording equipment, vibration vehicles, and other equipment and vehicles.  Depreciation and amortization expense as a percentage of revenues was 15.8% for the three months ended June 30, 2011, compared to 16.9% for the same period of 2010.

Income and loss from operations.  Income from operations was $1,213,844 for the three months ended June 30, 2011, compared to loss from operations of $1,388,365 for the same period of 2010.  This increase was primarily attributable to the significant increase in revenues, partially offset by increases in SG&A expenses, cost of services, and depreciation and amortization expenses discussed above.  EBITDA increased $3,591,539 to $5,992,391 for the three months ended June 30, 2011, from $2,400,852 for the same period of 2010, an increase of 149.6%.  This increase was a result of those factors mentioned above.  For a definition of EBITDA, a reconciliation of EBITDA to net income, and discussion of EBITDA, please refer to the section entitled “EBITDA” found below.

Interest expense.  Interest expense was $191,856 for the three months ended June 30, 2011, compared to $214,202 for the same period of 2010, a decrease of 10.4%.  This decrease was primarily attributable to our continuing payments on notes payable and capital lease obligations.

Income tax expense.  Income tax expense was $435,213 for the three months ended June 30, 2011, compared to an income tax benefit of $391,961 for the same period of 2010.  The effective tax expense rate was 42.6% for

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the three months ended June 30, 2011 compared to an effective tax benefit rate of 24.5%, for the same period of 2010.  See Note E of Notes to Financial Statements in Item 1.

EBITDA

We define EBITDA as net income plus interest expense, income taxes, and depreciation and amortization expense. We use EBITDA as a supplemental financial measure to assess:

·                  the financial performance of our assets without regard to financing methods, capital structures, taxes, or historical cost basis;

·                  our liquidity and operating performance over time and in relation to other companies that own similar assets and that we believe calculate EBITDA in a manner similar to us; and

·                  the ability of our assets to generate cash sufficient for us to pay potential interest costs.

We also understand that such data is used by investors to assess our performance. However, EBITDA is not a measure of operating income, operating performance, or liquidity presented in accordance with generally accepted accounting principles. When assessing our operating performance or our liquidity, you should not consider this data in isolation or as a substitute for our net income, cash flow from operating activities, or other cash flow data calculated in accordance with generally accepted accounting principles.  EBITDA excludes some, but not all, items that affect net income and operating income, and these measures may vary among other companies.  Therefore, EBITDA as presented below may not be comparable to similarly titled measures of other companies.  Further, the results presented by EBITDA cannot be achieved without incurring the costs that the measure excludes: interest expense, income taxes, and depreciation and amortization.

The following table reconciles our EBITDA to our net income:

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Liquidity and Capital Resources

Cash Flows

Cash flows from operating activities.

Net cash provided by operating activities was $24,373,937 for the six months ended June 30, 2011, compared to $1,799,951 for the same period of 2010.  The $22,573,986 increase to cash flows during the first six months of 2011 from the same period of 2010 was principally attributable to the increase in net income, adjustments for depreciation and deferred taxes, decrease in accounts receivable, decrease in costs and estimated earnings in excess of billings on uncompleted contracts, decrease in prepaid expenses and taxes, and an increase in taxes payable, partially offset by decreases to cash flows resulting from a decrease in accounts payable.

Working capital increased $5,590,049 to $19,283,937 as of June 30, 2011, from the December 31, 2010 working capital of $13,693,888.  This increase was primarily due to an $8,857,378 increase in cash and cash equivalents and a decrease in trade accounts payable of $6,497,471, partially offset by a decrease in trade accounts receivable of $4,481,257, a decrease in costs and estimated earnings in excess of billings on uncompleted contracts of $2,487,084, a decrease of $1,219,165 in prepaid federal income taxes, and an increase of $1,252,757 in federal and state income taxes payable.

Cash flows used in investing activities.

Net cash used in investing activities was $10,899,117 for the six months ended June 30, 2011, and $1,140,204  for the six months ended June 30, 2010.  This increase was due primarily to an increase in capital expenditures of $11,067,278 resulting from our purchase of additional GSR wireless seismic recording systems and related equipment, replacement vehicles, and five new vibration vehicles.

Cash flows used in financing activities.

Net cash used in financing activities was $4,629,309 for the six months ended June 30, 2011, and $4,342,126 for the six months ended June 30, 2010.  The increase was due primarily to principal payments on notes payable.

Capital expenditures.

During the six months ended June 30, 2011, the Company acquired $12,069,977 of vehicles and equipment, primarily to add to and replace similar vehicles and equipment, purchased additional ARAM ARIES seismic equipment, 2,500 additional GSR wireless channels, and five new vibration vehicles.  Cash of $11,067,278 and capital lease obligations from a vehicle leasing company of $1,002,699 were used to finance these acquisitions.  Although we do not budget for our capital expenditures, we may purchase additional equipment during 2011 should the demand for our services increase.

Liquidity

Our primary source of liquidity is cash generated from operations and term borrowings and leases from commercial banks and equipment lenders for capital expenditures.  Based on current forecasts, we believe that we have sufficient available cash and borrowing capacity to fund our working capital needs over the next 12 months.

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Capital Resources

We have relied on cash generated from operations, short-term borrowings from commercial banks and equipment lenders, and proceeds from a public offering of our common shares to fund our working capital requirements and capital expenditures.

The Company has a revolving credit agreement with a commercial bank.  The borrowing limit under the revolving line of credit agreement is $5,000,000 and was renewed on September 16, 2009, and again on September 16, 2010.  The revolving line of credit agreement will expire on September 16, 2011.  Our obligations under this agreement are secured by a security interest in our accounts receivable and 2,000 channels of GSR system seismic recording equipment acquired in September of 2010.  Interest on the outstanding amount under the revolving credit agreement is payable monthly at the greater of the prime rate of interest or five percent.  As of June 30, 2011, we had no borrowings outstanding under the revolving credit agreement.

In December of 2007, we completed a $4,120,254 loan transaction with a commercial lender for the purpose of providing funds for the purchase of our seventh new ARAM ARIES recording system. This loan is repayable over a period of 48 months at a fixed per annum interest rate of 6.38%. This loan is collateralized by the recording system equipment and the recording vehicles and two semi-trailers that transport the newly purchased equipment between jobs.  In January of 2008, the Company entered into a $2,463,101 loan agreement with a bank to provide financing for the purchase of new vibration vehicles.  The loan is repayable over a period of 57 months at a fixed per annum interest rate of 6.35% and is collateralized by the vibration vehicles.  In February of 2008, the Company exercised its purchase option for seismic recording equipment it had been renting.  In March of 2008, the Company entered into a $2,975,844 loan agreement with a commercial lender to provide financing for the purchase of this rented equipment and to replace an existing loan the Company had with the lender.  This loan is repayable over a period of 48 months at a fixed per annum interest rate of 5.75% and is collateralized by the equipment.  In August of 2008, the Company entered into a $2,003,700 loan agreement with a bank to provide financing for the purchase of new vibration vehicles.  This loan is repayable over 36 months at a fixed per annum interest rate of 6.00% and is collateralized by the vibration vehicles.  In September of 2008, the Company entered into a $2,690,402 loan agreement with a commercial lender to provide financing for our eighth new ARAM ARIES recording system. This loan is repayable over a period of 48 months at a fixed per annum interest rate of 6.00% and is collateralized by the recording system.  Also in September of 2008, the Company entered into a $1,092,053 loan agreement with the same commercial lender to provide financing for recording equipment that goes with the eighth ARAM ARIES recording system.  This loan is co-terminus with the loan for the recording system, carries a fixed per annum interest rate of 6.00%, and is collateralized by the recording equipment.  In June of 2010, we purchased a 3,000 channel Geosource seismic recording system for approximately $3,598,000.  This system was paid for in July of 2010 with existing cash.  In September of 2010, the Company entered into a $1,988,910 loan agreement with a commercial lender to purchase 2,000 additional recording channels that were added to the 3,000 channel Geosource seismic recording system purchased in June 2010.  This loan carries a fixed per annum interest rate of 5.00%, and is collateralized by the 2,000 channels of recording equipment.  This loan matures in September of 2013.  In December of 2010, the Company entered into a $2,986,200 loan agreement with a commercial lender to purchase 3,000 additional recording channels of Geosource seismic recording equipment.  This loan carries a fixed per annum interest rate of 5.00%, and is collateralized by the recording equipment.  This loan matures in December of 2013.

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Contractual Obligations

We believe that our capital resources, including our short-term investments, funds available under our revolving credit agreement, and cash flow from operations, will be adequate to meet our current operational needs. We believe that we will be able to finance our 2011 capital expenditures through cash flow from operations, borrowings from commercial lenders, and the funds available under our line of credit loan agreement.  However, our ability to satisfy working capital requirements, meet debt repayment obligations, and fund future capital requirements will depend principally upon our future operating performance which is subject to the risks inherent in our business, and will also depend on the extent to which the current recession adversely affects the ability of our customers, and/or potential customers, to pay promptly amounts owing to the Company under their service contracts with us.

Off-Balance Sheet Arrangements

As of June 30, 2011, we had no off-balance sheet arrangements.

Critical Accounting Policies

A discussion of our critical accounting policies can be found in our Annual Report on Form 10-K for the fiscal year ended December 31, 2010.  There have been no material changes to these policies (including critical accounting estimates and assumptions or judgments affecting the application of those estimates and assumptions) during the first six months of 2011.

Recently Issued Accounting Pronouncements

A discussion of recently issued accounting pronouncements can be found in our Annual Report on Form 10-K for the fiscal year ended December 31, 2010.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

We have not entered into any hedging agreements or swap agreements.  Our principal market risks include fluctuations in commodity prices which affect demand for and pricing of our services and the risk related to the concentration of our customers in the oil and natural gas industry.  Since all of our customers are involved in the oil and natural gas industry, there may be a positive or negative effect on our exposure to credit risk because our customers may be similarly affected by changes in economic and industry conditions.  For the year ended December 31, 2010, our largest customer accounted for approximately 15% of our revenues.

ITEM 4. CONTROLS AND PROCEDURES.

The Company maintains controls and procedures to ensure that it is able to collect the information it is required to disclose in the reports it files with the Securities and Exchange Commission and to process, summarize, and disclose this information within the time periods specified in the rules of the Securities and Exchange Commission.  Based on an evaluation of the Company’s disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended) as of the end of the period covered by this report conducted by the Company’s management, with the participation of the Chief Executive and Chief Financial Officers, the Chief Executive and Chief Financial Officers believe that these controls and procedures are effective to ensure that the Company is able to record, process, summarize, and report information required to be included in reports filed or submitted under the Exchange Act within the required time period.  There were no changes in the Company’s internal controls over financial reporting or in other factors during the quarter ended June 30, 2011, that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

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PART II - OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS.

The Company is a defendant in various legal actions that arose or may arise out of the normal course of business.  In our opinion, none of these actions has resulted, or will result, in any significant loss to us.

ITEM 1A. RISK FACTORS

For a discussion of those “Risk Factors” affecting the Company, you should carefully consider the “Risk Factors” discussed in Part I, under “Item 1A. Risk Factors” contained in our Annual Report on Form 10-K for the year ended December 31, 2010, and in our Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2011, which are herein incorporated by reference.  There have been no material changes from those risk factors previously disclosed in such Annual Report and Quarterly Report.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS. - None

ITEM 3. DEFAULTS UPON SENIOR SECURITIES. — None.

ITEM 4. RESERVED

ITEM 5. OTHER INFORMATION. — None.

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ITEM 6. EXHIBITS.

The following exhibits are included herein:

EXHIBITS INDEX

*Filed herewith.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

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EXHIBITS INDEX

*Filed herewith.

23

EXHIBIT 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

I, Wayne A. Whitener, certify that:

1.                                       I have reviewed this quarterly report on Form 10-Q of TGC Industries, Inc.;

2.                                       Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.                                       Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.                                       The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.               designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.              designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.               evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.              disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.                                       The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.               all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize, and report financial information; and

b.              any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:  August 9, 2011

EXHIBIT 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

I, James K. Brata, certify that:

1.                                       I have reviewed this report on Form 10-Q of TGC Industries, Inc.;

2.                                       Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.                                       Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.                                       The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.               designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.              designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.               evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.              disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.                                       The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.               all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize, and report financial information; and

b.              any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:  August 9, 2011

EXHIBIT 32.1

Certification of

Chief Executive Officer

of TGC Industries, Inc. Pursuant to

18 U.S.C. Section 1350, as adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

This certification is furnished solely pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code) and accompanies the quarterly report on Form 10-Q (the “Form 10-Q”) for the quarter ended June 30, 2011 of TGC Industries, Inc. (the “Company”).  I, Wayne A. Whitener, President and Chief Executive Officer of the Company, certify that, to the best of my knowledge:

(1)                                  The Form 10-Q fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934; and

(2)                                  The information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company as of, and for, the periods presented in the Form 10-Q.

Dated:  August 9, 2011

The foregoing certification is being furnished as an exhibit to the Form 10-Q pursuant to Item 601(b)(32) of Regulation S-K and Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code) and accordingly, is not being filed as part of the Form 10-Q for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and is not incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

EXHIBIT 32.2

Certification of

Chief Financial Officer

of TGC Industries, Inc. Pursuant to

18 U.S.C. Section 1350, as adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

This certification is furnished solely pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code) and accompanies the quarterly report on Form 10-Q (the “Form 10-Q”) for the quarter ended June 30, 2011 of TGC Industries, Inc. (the “Company”).  I, James K. Brata, Vice President and Chief Financial Officer of the Company, certify that, to the best of my knowledge:

(1)                                  The Form 10-Q fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934; and

(2)                                  The information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company as of, and for, the periods presented in the Form 10-Q.

Dated:  August 9, 2011

The foregoing certification is being furnished as an exhibit to the Form 10-Q pursuant to Item 601(b)(32) of Regulation S-K and Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code) and accordingly, is not being filed as part of the Form 10-Q for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and is not incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.