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SEC FORM 4/A SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940 		 
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OMB Number: 3235-0287
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
BLUM PETER H
(Last) (First) (Middle)
4 TRAPPING WAY
(Street)
PLEASANTVILLE NY 10570
(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
MITCHAM INDUSTRIES INC [ MIND ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
07/13/2004
4. If Amendment, Date of Original Filed (Month/Day/Year)
07/15/2004 		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. 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
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 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: 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 Option (Right to Buy) $4.16 07/13/2004 J 0(1) 07/13/2005 07/13/2014 Common Stock 0 $4.16 0 D
Explanation of Responses:
1. On July 13, 2004, the Issuer's board of directors purported to grant to the reported person options to purchase 50,000 shares of common stock at an exercise price of $4.16 per share, which options were reported on a Form 4 filed by the reporting person on July 15, 2004. Such options were invalidly granted and, therefore, have no force or effect.
/s/ Christopher C. Siffert, Attorney-in-fact 02/01/2005
** 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 Number.
                               POWER OF ATTORNEY


         Know all by these presents, that effective as of July 1, 2004 the
undersigned hereby constitutes and appoints each of Christopher C. Siffert and
Billy F. Mitcham, Jr., or either of them signing singly, and with full power of
substitution, the undersigned's true and lawful attorney-in-fact to:

                  (1) prepare, execute in the undersigned's name and on the
         undersigned's behalf, and submit to the U.S. Securities and Exchange
         Commission (the "SEC") a Form ID, including amendments thereto, and
         any other documents necessary or appropriate to obtain codes and
         passwords enabling the undersigned to make electronic filings with the
         SEC of reports required by Section 16(a) of the Securities Exchange
         Act of 1934 or any rule or regulation of the SEC;

                  (2) execute for and on behalf of the undersigned, in the
         undersigned's capacity as an officer and/or director of Mitcham
         Industries, Inc. (the "Company"), Forms 3, 4, and 5 in accordance with
         Section 16(a) of the Securities Exchange Act of 1934 and the rules
         thereunder;

                  (3) do and perform any and all acts for and on behalf of the
         undersigned which may be necessary or desirable to complete and
         execute any such Form 3, 4, or 5, complete and execute any amendment
         or amendments thereto, and timely file such form with the SEC and any
         stock exchange or similar authority; and

                  (4) take any other action of any type whatsoever in
         connection with the foregoing which, in the opinion of such
         attorney-in-fact, may be of benefit to, in the best interest of, or
         legally required by, the undersigned, it being understood that the
         documents executed by such attorney-in-fact on behalf of the
         undersigned pursuant to this Power of Attorney shall be in such form
         and shall contain such terms and conditions as such attorney-in-fact
         may approve in such attorney-in-fact's discretion.

         The undersigned hereby grants to each such attorney-in-fact full power
and authority to do and perform any and every act and thing whatsoever
requisite, necessary, or proper to be done in the exercise of any of the rights
and powers herein granted, as fully to all intents and purposes as the
undersigned might or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming all that such
attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall
lawfully do or cause to be done by virtue of this power of attorney and the
rights and powers herein granted. The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934.

         This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.

         IN WITNESS WHEREOF, the undersigned have caused this Power of Attorney
to be executed as of this 1st day of February, 2005.


                                       /s/ PETER H. BLUM
                                       --------------------------------------
                                       Peter H. Blum