U.S. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K Current Report Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report October 18, 2002 (Date of earliest event reported) TGC Industries, Inc. (Exact name of registrant as specified in its charter) Texas 0-14908 74-2095844 (State or other (Commission (I.R.S. Employer jurisdiction File Number) Identification No.) of incorporation) 1304 Summit, Suite 2 Plano, Texas 75074 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (972) 881-1099 Item 5. Other Events On October 18, 2002, one of TGC Industries, Inc.'s ("TGC" or the "Company")contracts for geophysical services was cancelled. It was reported to the Board on Directors of the Company that said contract represented approximately 55% of the Company's current backlog. 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 hereunto duly authorized. TGC INDUSTRIES, INC. October 18, 2002 By: /s/ WAYNE A. WHITENER Wayne A. Whitener, President and CEO (Principal Executive Officer)