DAWSON GEOPHYSICAL CO — Director's Dealing 2008

Dec 18, 2008

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TGC INDUSTRIES INC (TGE)
CIK: 0000799165
Period of Report: 2008-12-18

Reporting Person: Brata James Kevin (VP and CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2008-12-18	Common Stock	P	1500	$2.56	Acquired	11500	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Incentive Stock Option	$3.37	2013-10-23	Common Stock (30000)	30000	Direct

Footnotes

F1: Stock options vest annually one-third from date of grant (10-24-2008).