UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                 SCHEDULE 13G/A

                    Under the Securities Exchange Act of 1934
                                (Amendment No.2)*

                           DAWSON GEOPHYSICAL COMPANY
- --------------------------------------------------------------------------------
                                (Name of Issuer)

                                  Common Stock

- --------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    239359102
                              --------------------
                                 (CUSIP Number)

                                December 31, 2000
- --------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

Check the  appropriate box to designate the rule pursuant to which this Schedule
is filed:

         / X /    Rule 13d-1(b)
         /   /    Rule 13d-1(c)
         /   /    Rule 13d-1(d)

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the  liabilities of the section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).





                                 SCHEDULE 13G/A
                               CUSIP NO. 239359102

1.       Names of Reporting Persons.
         I.R.S. Identification Nos. of above persons (entities only).

         Quaker Capital Management Corporation
         -----------------------------------------------------------------------

2.       Check the Appropriate Box if a Member of a Group
         (a)
                  -----
         (b)        X
                  -----

3.       SEC Use Only
                        --------------------------------------------------------

4.       Citizenship or Place of Organization                 Pennsylvania
                                                              ---------------

Number of         5.       Sole Voting Power                        0
Shares                                                        ------------------
Beneficially      6.       Shared Voting Power                360,823
Owned by                                                      ------------------
Each Reporting    7.       Sole Dispositive Power                   0
Person With:                                                  ------------------
                  8.       Shared Dispositive Power           360,823
                                                              ------------------

9.       Aggregate Amount Beneficially Owned by Each Reporting Person

         360,823
         ---------

10.      Check if the Aggregate Amount in Row (9) Excludes Certain
         Shares
                   --------

         The Reporting Person disclaims  beneficial  ownership of 360,823 shares
         owned by its clients.

11.      Percent of Class Represented by Amount in Row (9)      6.64%
                                                              -----------

12.      Type of Reporting Person                                     IA
                                                             -------------------



                               Page 2 of 6 Pages



                                 SCHEDULE 13G/A
                               CUSIP NO. 239359102

Item 1.

         (a)      Name of Issuer

                  Dawson Geophysical Company
                  --------------------------------------------------------------

         (b)      Address of Issuer's Principal Executive Offices

                  508 West Wall, Suite 800, Midland, Texas 79701
                  --------------------------------------------------------------
Item 2.

         (a)      Name of Persons Filing

                  Quaker Capital Management Corporation
                  --------------------------------------------------------------

         (b)      Address of Principal Business Office or, if none,
                  Residence

                  401 Wood Street, Suite 1300, Pittsburgh, PA  15222
                  --------------------------------------------------------------

         (c)      Citizenship

                  Pennsylvania, USA
                  --------------------------------------------------------------

         (d)      Title of Class of Securities

                  Common Stock
                  --------------------------------------------------------------

         (e)      CUSIP Number

                  239359102
                  --------------------------------------------------------------



                               Page 3 of 6 Pages




                                 SCHEDULE 13G/A
                               CUSIP NO. 239359102


Item 3.           If this statement  is filed pursuant to  ss.ss.240.13d-1(b) or
                  240.13d-2(b) or (c), check whether the person filing is a:

     (a)      /   /        Broker of dealer registered under section 15 of
                           the Act;

     (b)      /   /        Bank as defined in section 3(a)(6) of the Act;

     (c)      /   /        Insurance company as defined in section 3(a)(19)
                           of the Act;

     (d)      /   /        Investment company registered under section 8 of
                           the Investment Company Act of 1940;

     (e)      / X /        An investment adviser in accordance with ss.240.13d-
                           1(b)(l)(ii)(E);

     (f)      /   /        An employee benefit plan or endowment fund in
                           accordance with ss.240.13d-1(b)(1)(ii)(F);

     (g)      /   /        A parent holding company or control person in
                           accordance with ss.240.13d-1(b)(1)(ii)(G);

     (h)      /   /        A savings association as defined in Section 3(b)
                           of the Federal Deposit Insurance Act;

     (i)      /   /        A church plan that is excluded from the definition
                           of an investment company under section 3(c)(14)
                           of the Investment Company Act of 1940;

     (j)      /   /        Group, in accordance with ss.240.13d-1((b)(l)(ii)(J)

Item 4.  Ownership
         ---------

         (a)      The Reporting Person,  in its capacity as investment  adviser,
                  may be deemed to be the beneficial  owner of 360,823 shares of
                  the  Common  Stock of the  Issuer  which are owned by  various
                  investment   advisory  clients  of  the  Reporting  Person  in
                  accounts  over which the  Reporting  Person has  discretionary
                  authority. The filing of this report shall not be construed as
                  an  admission  that the  Reporting  Person is, for purposes of
                  Section  13(d) or 13(g) of the Act,  the  beneficial  owner of
                  these securities.

         (b)      The  shares  covered  by  this report  represent  6.64% of the
                  Common Stock of the Issuer.



                               Page 4 of 6 Pages




                                 SCHEDULE 13G/A
                               CUSIP NO. 239359102


         (c)      The Reporting  Person has shared voting and dispositive  power
                  over 360,823  shares owned by its clients and held in accounts
                  over  which  it has  discretionary  authority.  The  Reporting
                  Person does not have sole voting or dispositive power over any
                  of the shares that it may be deemed to beneficially own.

Item 5.  Ownership of Five Percent or Less of a Class

                  If this statement is being filed to report the fact that as of
the date hereof,  the reporting  person has ceased to be the beneficial owner of
more than five percent of the class of securities, check the following:

                                                                      ----------

Item 6.  Ownership of More than Five Percent on Behalf of
         Another Person

                  The shares  with  respect  to which  this  report is filed are
owned by a variety of investment advisory clients of the Reporting Person, which
clients are entitled to receive  dividends on and the proceeds  from the sale of
such shares. No client is known to own more than 5% of the class.

Item 7.  Identification and  Classification of the Subsidiary Which Acquired the
         Security Being Reported on by the Parent Holding Company

         Not applicable.

Item 8.  Identification and Classification of Members of the Group

         Not applicable.

Item 9.  Notice of Dissolution of Group

         Not applicable.

Item 10. Certification

                  By signing  below I certify  that, to the best of my knowledge
and belief,  the securities  referred to above were acquired and are held in the
ordinary  course  of  business  and were not  acquired  and are not held for the
purpose of or with the effect of  changing  or  influencing  the  control of the
issuer of the  securities  and were not acquired and are not held in  connection
with or as a participant in any transaction having that purpose or effect.


                               Page 5 of 6 Pages



                                 SCHEDULE 13G/A
                               CUSIP NO. 239359102


                                    SIGNATURE

                  After  reasonable  inquiry and to the best of my knowledge and
belief,  I certify  that the  information  set forth in this  statement is true,
complete and correct.

                               QUAKER CAPITAL MANAGEMENT CORPORATION


                                       February 12, 2001
                                       -----------------------------------------
                                                    Date


                                       /s/ Mark G. Schoeppner
                                       -----------------------------------------
                                                    Signature


                                       /s/ Mark G. Schoeppner, President
                                       -----------------------------------------
                                                    Name/Title



                               Page 6 of 6 Pages