Company:  ION GEOPHYSICAL CORP (IO)
Form Type:  10-K/A
Filing Date:  3/26/2012 
CIK:  0000866609 
Address:  2105 CITYWEST BLVD
SUITE 400 
City, State, Zip:  HOUSTON, Texas 770422839 
Telephone:  281.933.3339 
Fiscal Year:  12/31 
Last Trade
Last Trade: 
$6.29   		Change: 
-0.01 (-0.16%)  
Trade Time: 
May 24   		Market Cap: 
$986.59M
Description of Business
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  FORM 10-K/A
    PART IV
      Item 15. Exhibits and Financial Statement Schedules
    SIGNATURES
    EXHIBIT INDEX
  EXHIBIT 23.2
    Consent of Independent Registered Public Accounting Firm
  EXHIBIT 31.1
    CERTIFICATION OF CHIEF EXECUTIVE OFFICER
  EXHIBIT 31.2
    CERTIFICATION OF CHIEF FINANCIAL OFFICER
  EXHIBIT 32.1
    CERTIFICATION OF CHIEF EXECUTIVE OFFICER
  EXHIBIT 32.2
    CERTIFICATION OF CHIEF FINANCIAL OFFICER
  EXHIBIT 99.1
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