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Super-major E&P Client Gives Go-Ahead for Full-Field Seismic Project

HOUSTON, July 21 /PRNewswire-FirstCall/ — ION Geophysical Corporation
(NYSE: IO) today announced that its super-major E&P client has sanctioned the
next phase of a high channel count, multicomponent (full-wave) seismic
acquisition program in northeast Texas. Data acquisition of the first phase
began in May 2009 using a 6,100 station (18,300 channel 3C) FireFly recording
system from ION. The E&P company’s two primary goals in the initial phase of
the program were to generate a seismic data volume that would assist in
optimizing the acquisition parameters for an anticipated full-field seismic
project and to test FireFly’s recording capabilities using Vibroseis energy
sources.

Jim Hollis, President and COO at ION, commented, “I believe the Phase I
FireFly deployment provided a highly favorable outcome by demonstrating
FireFly’s potential as a high production seismic acquisition system. FireFly
performed to our client’s specifications in Vibroseis mode, helping them to
acquire a high quality, multicomponent seismic data volume in a challenging
operating environment in an efficient, HSE-friendly manner. The full-field
phase of this program involves an even larger FireFly system, roughly 10,000
stations (or 30,000 3C channels).”

Dawson Geophysical, Inc., America’s leading provider of onshore seismic
data acquisition services, was awarded the contract to acquire the data both
for Phase I and the full-field program.

According to Dave Wisniewski, Vice President of Dawson, “Dawson has a long
history working with remote seismic recording systems. We are glad to be
among the early contractors to deploy the FireFly system on a commercial
project. This area of East Texas presents numerous acquisition challenges, as
the region is interspersed with farms, forests, swamps, road crossings, and
mining operations. We appreciated the hands-on field support that ION
provided to our crew and look forward to working on the full-field project.”

To learn more about FireFly, visit: www.iongeo.com/FireFly

About ION

ION Geophysical Corporation is a leading provider of geophysical
technology, services, and solutions for the global oil & gas industry. ION’s
offerings allow E&P operators to obtain higher resolution images of the
subsurface to reduce the risk of exploration and reservoir development, and
enable seismic contractors to acquire geophysical data more efficiently.
Additional information about ION is available at www.iongeo.com.

About Dawson

Dawson Geophysical Company is the leading provider of U.S. onshore seismic
data acquisition services as measured by the number of active data acquisition
crews. Founded in 1952, Dawson acquires and processes 2D, 3D, and
multi-component seismic data solely for its clients, ranging from major oil
and gas companies to independent oil and gas operators as well as providers of
multi-client data libraries. Additional information about Dawson is available
at www.dawson3d.com.

The information included herein contains forward-looking statements within
the meaning of Section 27A of the Securities Act of 1933 and Section 21E of
the Securities Exchange Act of 1934. Actual results may vary fundamentally
from those described in these forward-looking statements. All forward-looking
statements reflect numerous assumptions and involve a number of risks and
uncertainties. These risks and uncertainties include risk factors that are
disclosed by ION from time to time in its filings with the Securities and
Exchange Commission
.

Contacts
ION (Financial community)
Chief Financial Officer Brian Hanson, +1 281.879.3672

ION (Media affairs)
Director – Corporate Marketing Karen Abercrombie, +1 713.366.7281
karen.abercrombie@iongeo.com

SOURCE ION Geophysical Corporation

Web Site: http://www.iongeo.com
http://www.dawson3d.com
(IO)