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HOUSTON, Jan. 16 /PRNewswire-FirstCall/ — ION Geophysical Corporation
(“ION”) (NYSE: IO) announced today that the Company will be presenting at the
Johnson Rice Third Annual Emerging Growth Conference to be held at the St.
Regis Hotel in Houston, Texas on January 23 -24, 2008.

Bob Peebler, President and Chief Executive Officer and Brian Hanson,
Executive Vice President and Chief Financial Officer are scheduled to present
on Wednesday, January 23, 2008 at 8:00 a.m. Central 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. Listeners should access the site at
least 15 minutes prior to the presentation start time to register and, if
necessary, download and install the required software.

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 Corporation (281) 879-3672

Jack Lascar, Partner
Karen Roan, SVP
DRG&E (713) 529-6600

SOURCE ION Geophysical Corporation

/CONTACT: R. Brian Hanson, Chief Financial Officer of ION Geophysical
Corporation, +1-281-879-3672; or Jack Lascar, Partner, or Karen Roan, SVP,
both of DRG&E, +1-713-529-6600, for ION Geophysical Corporation/

/Web site: http://www.iongeo.com /