<SEC-DOCUMENT>0000866609-16-000086-index.html : 20160428
<SEC-HEADER>0000866609-16-000086.hdr.sgml : 20160428
<ACCEPTANCE-DATETIME>20160428160847
ACCESSION NUMBER:		0000866609-16-000086
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		6
CONFORMED PERIOD OF REPORT:	20160428
ITEM INFORMATION:		Entry into a Material Definitive Agreement
ITEM INFORMATION:		Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant
ITEM INFORMATION:		Unregistered Sales of Equity Securities
ITEM INFORMATION:		Material Modifications to Rights of Security Holders
ITEM INFORMATION:		Other Events
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20160428
DATE AS OF CHANGE:		20160428

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:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12691
		FILM NUMBER:		161600111

	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>8-K
<SEQUENCE>1
<FILENAME>ion-8xkclosingoftheexchang.htm
<DESCRIPTION>8-K
<TEXT>
Document 1 - file: ion-8xkclosingoftheexchang.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-4.1
<SEQUENCE>2
<FILENAME>exhibit41to8-kxnewindentur.htm
<DESCRIPTION>EXHIBIT 4.1
<TEXT>
Document 2 - file: exhibit41to8-kxnewindentur.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-4.3
<SEQUENCE>3
<FILENAME>exhibit43to8-kxfirstsupple.htm
<DESCRIPTION>EXHIBIT 4.3
<TEXT>
Document 3 - file: exhibit43to8-kxfirstsupple.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.1
<SEQUENCE>4
<FILENAME>exhibit101to8-kxintercredi.htm
<DESCRIPTION>EXHIBIT 10.1
<TEXT>
Document 4 - file: exhibit101to8-kxintercredi.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.2
<SEQUENCE>5
<FILENAME>exhibit102to8-kxsecondamen.htm
<DESCRIPTION>EXHIBIT 10.2
<TEXT>
Document 5 - file: exhibit102to8-kxsecondamen.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>6
<FILENAME>ion-pressreleasecompletion.htm
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
Document 6 - file: ion-pressreleasecompletion.htm

</DOCUMENT>
</SEC-DOCUMENT>