Ownership Submission
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

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
SCHWAUSCH SCOTT
   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)
VP & Corp Controller
(Last)
(First)
(Middle)
2105 CITYWEST BOULEVARD, SUITE 100		 3. Date of Earliest Transaction (Month/Day/Year)
12/01/2018
(Street)

HOUSTON, TX 77042-2855		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction 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 12/01/2018   A   9,611 (1) A $ 0 13,900 D  

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction 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
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(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
Stock Appreciation Right $ 8.85 12/01/2018   A   10,249     (2) 12/01/2028 Common Stock 10,249 $ 0 10,249 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
SCHWAUSCH SCOTT
2105 CITYWEST BOULEVARD
SUITE 100
HOUSTON, TX 77042-2855		       VP & Corp Controller  

Signatures

 Rebecca F. Sacco, attorney-in-fact   12/04/2018
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) Restricted Stock award issued pursuant to the ION Geophysical Corporation Third Amended and Restated 2013 Long Term Incentive Plan. The shares of restricted stock are subject to both time-based and performance-based vesting requirements. The time-based vesting requirements provide that the shares vest in three equal installments beginning on the first anniversary of the grant date, subject to satisfaction of the performance-based vesting requirements. The performance-based vesting requirements provide that the shares vest in three equal portions upon achievement of ION common stock 20 day volume weighted average price per share targets of $17.50, $22.50 and $27.50, subject to satisfaction of the time-based vesting requirements.
(2) Cash-settled Stock Appreciation Right ("SARs") issued pursuant to the ION Geophysical Corporation 2018 Stock Appreciation Rights Plan. The SARs are subject to both time-based and performance-based vesting requirements. The time-based vesting requirements provide that the SARs vest in three equal installments beginning on the first anniversary of the grant date, subject to satisfaction of the performance-based vesting requirements. The performance-based vesting requirements provide that the SARs vest in three equal portions upon achievement of ION common stock 20 day volume weighted average price per share targets of $17.50, $22.50 and $27.50, subject to satisfaction of the time-based vesting requirements. The maximum value of each SAR is capped at $27.50.

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