FORM 4
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

HULME COLIN 		2. Issuer Name and Ticker or Trading Symbol

ION GEOPHYSICAL CORP [ IO ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                      _____ 10% Owner
__ X __ Officer (give title below)      _____ Other (specify below)
EVP, Ocean Bottom Services
(Last)          (First)          (Middle)

2105 CITYWEST BOULEVARD, SUITE 400 		3. Date of Earliest Transaction (MM/DD/YYYY)

3/1/2015
(Street)

HOUSTON, TX 77042
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock   3/1/2015     A    24610   (1) A $0.00   80270   D    
Common Stock   3/1/2015     F    1368   (2) D $2.28   78902   (3) D    

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8) 		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4) 		8. Price of Derivative Security
(Instr. 5) 		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (right to buy)   $2.28   3/1/2015     A      36915       3/1/2016   (4) 3/1/2025   Common Stock   36915   $0.00   36915   D    
Stock Appreciation Right   $2.28   3/1/2015     A      152983         (5) 3/1/2025   Common Stock   152983   $0.00   152983   D    

Explanation of Responses:
( 1)  Restricted Stock grant issued pursuant to the ION Geophysical Corporation 2013 Long Term Incentive Plan. Shares will vest in three equal annual installments beginning the first anniversary of the transaction date in Column 2.
( 2)  Payment of tax liability by delivering or withholding shares incident to the vesting of restricted stock.
( 3)  Includes 500 shares acquired under the ION Employee Stock Purchase Plan.
( 4)  Issued pursuant to the ION Geophysical Corporation 2013 Long Term Incentive Plan and become exercisable in four equal annual installments beginning on the date specified in Column 6.
( 5)  Issued pursuant to the ION Geophysical Corporation Stock Appreciation Rights Plan. The SARs will vest in one-third increments upon the achievement of performance targets set at 20%, 25% and 30% appreciation of the 20-day volume weighted average price per share over the exercise price of the SAR. No SARs can be exercised prior to the first anniversary of the grant date. Beginning on the first anniversary date, SARs can be exercised up to one-third per year.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
HULME COLIN
2105 CITYWEST BOULEVARD
SUITE 400
HOUSTON, TX 77042

EVP, Ocean Bottom Services

Signatures
/s/ Rebecca F. Sacco, attorney-in-fact 3/3/2015
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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