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HOUSTON, Jan. 15 /PRNewswire-FirstCall/ — ION Geophysical Corporation
(“ION”) (NYSE: IO) announced today that the Company will be presenting at the
Sidoti Fifth Annual Emerging Growth Institutional Investor Forum to be held in
Palm Beach, Florida on January 22-23, 2008.

Brian Hanson, Executive Vice President and Chief Financial Officer is
scheduled to present on Tuesday, January 22, 2008 at 11:35 a.m. Eastern Time.
The presentation is not being webcast. A copy of the presentation 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: R. Brian Hanson
Chief Financial Officer
ION Geophysical (281) 879-3672

Jack Lascar / Karen Roan
DRG&E (713) 529-6600

SOURCE ION Geophysical Corporation

Web site: http://www.iongeo.com
(IO)