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DAWSON GEOPHYSICAL

An orange four-cornered safety sign marked SEISMIC CREW AHEAD is a sure sign your area is being surveyed for gas deposits in geological formations. Dawson Geophysical Company, based in Midland Texas, is one of the leading companies performing these 2D and 3D and multi-component land seismic data imaging services on Marcellus Shale, using vibrator crews and dynamite crews.

Below are some photos of what a seismic survey will look like to the average citizen, from the warning signs, to the wires duct-taped to the roads, the orange surveyor stakes with numbers and letters, the strange looking 'thumper trucks' and a host of vans and golf cart sized vehicles. It's a convention of vehicles and equipment.

Some cords lead to dynamite charges that are placed 20-feet underground and later detonated to help perform seismic surveys by the dynamite crews. Alien-looking Thumper Trucks are used by the vibrator crews. Designated sections, or grids, are surveyed one grid at a time. Seismic crews use Garmin GPS units for their mapping, and helicopters may play an additional role in some geological surveys.

Corporate Headquarters
Dawson Geophysical
508 West Wall – Suite 800
Midland, Texas 79701
Phone: 1-800-332-9766

Orange cords traverse the roadways through a thick
protective coating that is duct-taped to the road

Miles of orange cords connect seismic survey equipment

Orange surveyor stakes marked with letters and
numbers are used in the seismic survey

Three thumper trucks between some tractor trailers.

Dawson seismic crew has set up shop in
this rural Pennsylvania field

Dawson thumper trucks each have 62,000-pound
(31-ton) peak force Vibroseis equipment.

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All Hail Marcellus Shale

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