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HOUSTON, Aug. 26 /PRNewswire-FirstCall/ — ION Geophysical Corporation
(NYSE: IO) today announced that the Company will be presenting at the Lehman
Brothers CEO Energy/Power Conference to be held in New York City on
September 2 – 4, 2008.

Bob Peebler, President and Chief Executive Officer, and Brian Hanson,
Executive Vice President and Chief Financial Officer, are scheduled to present
on Tuesday, September 2, 2008 at 4:20 p.m. Eastern Time. A live broadcast of
the presentation and the accompanying slides will be available in the Investor
Relations section of the ION website at http://www.iongeo.com and will be
archived there for approximately 90 days.

About ION

ION 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 http://www.iongeo.com.

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

Jack Lascar, +1 713.529.6600
DRG&E

SOURCE ION Geophysical Corporation
Web site: http://www.iongeo.com
(IO)