<SEC-DOCUMENT>0000866609-16-000094-index.html : 20160523
<SEC-HEADER>0000866609-16-000094.hdr.sgml : 20160523
<ACCEPTANCE-DATETIME>20160523162807
ACCESSION NUMBER:		0000866609-16-000094
CONFORMED SUBMISSION TYPE:	SD
PUBLIC DOCUMENT COUNT:		2
<RULE>
<RULE-NAME>13p-1
<ITEM>
<ITEM-NUMBER>1.01
<ITEM-PERIOD>20151231
</ITEM>
<ITEM>
<ITEM-NUMBER>1.02
<ITEM-PERIOD>20151231
</ITEM>
</RULE>
FILED AS OF DATE:		20160523
DATE AS OF CHANGE:		20160523

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ION GEOPHYSICAL CORP
		CENTRAL INDEX KEY:			0000866609
		STANDARD INDUSTRIAL CLASSIFICATION:	OIL AND GAS FIELD EXPLORATION SERVICES [1382]
		IRS NUMBER:				222286646
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SD
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12691
		FILM NUMBER:		161669363

	BUSINESS ADDRESS:	
		STREET 1:		2105 CITYWEST BLVD
		STREET 2:		SUITE 400
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			770422839
		BUSINESS PHONE:		281.933.3339

	MAIL ADDRESS:	
		STREET 1:		2105 CITYWEST BLVD
		STREET 2:		SUITE 400
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			770422839

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INPUT OUTPUT INC
		DATE OF NAME CHANGE:	19930328
</SEC-HEADER>
<DOCUMENT>
<TYPE>SD
<SEQUENCE>1
<FILENAME>a2015formsd.htm
<DESCRIPTION>SD
<TEXT>
Document 1 - file: a2015formsd.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-1.01
<SEQUENCE>2
<FILENAME>a2015conflictmineralsreport.htm
<DESCRIPTION>EXHIBIT 1.01
<TEXT>
Document 2 - file: a2015conflictmineralsreport.htm

</DOCUMENT>
</SEC-DOCUMENT>