========== OMB APPROVAL FORM 4 OMB Number: 3235-0287 ========== Expires: January 31, 2005 Estimated average burden [_] Check this box if no longer hours per response.....0.5 subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940 (Print or Type Responses) ________________________________________________________________________________ 1. Name and Address of Reporting Person* THOMPSON TIM C -------------------------------------------------------------------------------- (Last) (First) (Middle) 508 W. WALL, SUITE 800 -------------------------------------------------------------------------------- (Street) MIDLAND TX 79701 -------------------------------------------------------------------------------- (City) (State) (Zip) ________________________________________________________________________________ 2. Issuer Name and Ticker or Trading Symbol DWSN DAWSON GEOPHYSICAL COMPANY ________________________________________________________________________________ 3. I.R.S. Identification Number of Reporting Person, if an entity (voluntary) ###-##-#### _______________________________________________________________________________ 4. Statement for Month/Day/Year 11/02 ________________________________________________________________________________ 5. If Amendment, Date of Original (Month/Day/Year) ________________________________________________________________________________ 6. Relationship of Reporting Person(s) to Issuer (Check all applicable) [X] Director [_] 10% Owner [_] Officer (give title below) [_] Other (specify below) ________________________________________________________________________________ 7. Individual or Joint/Group Filing (Check Applicable Line) [_] Form filed by One Reporting Person [_] Form filed by More than One Reporting Person ________________________________________________________________________________ ================================================================================ TABLE I -- NON-DERIVATIVE SECURITIES ACQUIRED, DISPOSED OF, OR BENEFICIALLY OWNED ================================================================================

FORM 4 (continued) ================================================================================ TABLE II -- DERIVATIVE SECURITIES ACQUIRED, DISPOSED OF, OR BENEFICIALLY OWNED (E.G., PUTS, CALLS, WARRANTS, OPTIONS, CONVERTIBLE SECURITIES) ================================================================================

Explanation of Responses: /s/ Tim C. Thompson 1-3-03 --------------------------------------------- ----------------------- **Signature of Reporting Person Date Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. * If the Form is filed by more than one Reporting Person, see Instruction 4(b)(v). ** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a). Note: File three copies of this Form, one of which must be manually signed. If space provided is insufficient, see Instruction 6 for procedure.

DAWSON GEOPHYSICAL CO 4