Press Release Source: TGC Industries, Inc.

TGC Industries Announces Fourth Quarter 2008 Earnings Release and Conference Call Schedule

PLANO, TEXAS – February 3, 2009 – TGC Industries, Inc. (NASDAQ: TGE) today announced plans to release fourth quarter 2008 financial results on Monday, February 23, 2009 before the market opens. In conjunction with the release, TGC Industries has scheduled a conference call, which will be broadcast live over the Internet the same day at 9:30 a.m. eastern time (8:30 a.m. central time).

What: TGC Industries Fourth Quarter Earnings Conference Call

When: Monday, February 23, 2009 – 9:30 a.m. eastern / 8:30 a.m. central

How:Live via phone by dialing 303-262-2142 and asking for the TGC Industries call at least 10 minutes prior to the start time, or live over the Internet by logging onto the web at the address below

Where: http://www.tgcseismic.com

A telephonic replay of the conference call will be available through March 9, 2009 and may be accessed by calling 303-590-3000 using passcode 11126135#. A web cast archive will also be available at www.tgcseismic.com shortly after the call and will be accessible for approximately 90 days.

TGC Industries, Inc., based in Plano, Texas, with branch offices in Houston, Oklahoma City and Denver, is one of the leading providers of seismic data acquisition services throughout the continental United States.

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Source: TGC Industries, Inc.