Exhibit 8

List of CGG subsidiaries (March 31, 2014)

(Certain dormant or small subsidiaries of the Group have not been included in the list below)

French Companies	Head Office	% of interest
CGG Services SA	Massy, France		100.0
CGG Explo SARL	Massy, France		100.0
Geomar SAS	Paris, France		100.0
Sercel Holding SA	Carquefou, France		100.0
Sercel SA	Carquefou, France		100.0
Foreign Companies	Head Office	% of interest
CGG Holding B.V.	Amsterdam, The Netherlands		100.0
CGG Marine B.V.	Amsterdam, The Netherlands		100.0
CGG Data Management (Netherlands) B.V.	Montfoort, The Netherlands		100.0
CGG Jason (Netherlands) B.V.	Gravenhague, The Netherlands		100.0
De Regt Marine Cables B.V.	Leidschendam, The Netherlands		100.0
CGG Electromagnetics (Italy) Srl	Milan, Italy		100.0
CGG International SA	Geneva, Switzerland		100.0
CGG Data Services AG	Zug, Switzerland		100.0
CGG Geoscience GmbH	Zug, Switzerland		100.0
Wavefield Inseis AS	Bergen, Norway		100.0
CGG Marine Resources Norge AS	Høvik, Norway		100.0
CGG Geo Vessels AS	Bergen, Norway		100.0
CGG Marine (Norway) AS	Oslo, Norway		100.0
CGG Seismic Imaging (Norway)AS	Oslo, Norway		100.0
CGG Services (Norway) AS	Oslo, Norway		100.0
Profocus Systems AS	Fyllingsdalen, Norway		100.0
Robertson Geolab Nor AS	Trondheim, Norway		100.0
Exploration Vessel Resources AS	Bergen, Norway		100.0
Exploration Investment Resources II AS	Bergen, Norway		100.0
Exploration Vessel Resources II AS	Bergen, Norway		100.0
CGG Services (UK) Ltd.	Crawley, United Kingdom		100.0
CGG Data Management (UK) Limited	Conwy, United Kingdom		100.0
CGG Jason (UK) Limited	Wallingford, United Kingdom		100.0
CGG NPA Satellite Mapping Limited	Edenbridge, United Kingdom		100.0
CGG Seismic Imaging (UK) Limited	Swanley, United Kingdom		100.0
Robertson (UK) Limited	Llandudno, United Kingdom		100.0
Robertson Geospec International	Llandudno, United Kingdom		100.0
Veritas Caspian LLP	Almaty, Kazakhstan		50.0
CGG do Brasil Participaçoes Ltda	Rio do Janeiro, Brazil		100.0
Veritas do Brasil Ltda.	Rio do Janeiro, Brazil		100.0
LASA Prospeccoes S.A	Rio do Janeiro, Brazil		100.0
Geomag S.A.Prospeccoes Aerogeofisicas	Rio do Janeiro, Brazil		100.0
CGGVeritas Services de Mexico SA de CV	Mexico City, Mexico		100.0
CGG Geoscience de Mexico SA de CV	Mexico City, Mexico		100.0
Exgeo CA	Caracas, Venezuela		100.0
CGG Holding (U.S.) Inc	Delaware, United States		100.0
CGG Services (U.S.) Inc.	Delaware, United States		100.0

Foreign Companies	Head Office	% of interest
CGG Land (U.S.) Inc.	Delaware, United States		100.0
CGG Jason (U.S.) Inc.	Houston, United States		100.0
CGG Canada Services Ltd.	Calgary, Canada		100.0
Viking Maritime Inc.	Houston, United States		100.0
CGG Services (Canada) Inc.	Alberta, Canada		100.0
Hampson Russell Ltd.	Alberta, Canada		100.0
CGG Services (Australia) Pty. Ltd.	Perth, Australia		100.0
CGG Seismic Imaging (Australia) Pty Ltd.	Perth, Australia		100.0
CGG Marine (Australia) Pty Ltd.	Perth, Australia		100.0
CGG Jason (Australia) Pty Ltd.	Perth, Australia		100.0
CGG Ground Geophysics (Australia) Pty Ltd.	Perth, Australia		100.0
CGG Services India Private Ltd.	Navi Mumbai, India		100.0
CGG Technology Services (Beijing) Co. Ltd.	Beijing, China		100.0
CGG Geosciences Bejing Ltd	Beijing, China		100.0
CGG Services (Singapore) Pte Ltd	Singapore		100.0
Ardiseis FZCO	Dubai, United Arab Emirates		51.0
CGG Vostok	Moscow, Russia		100.0
CGG (Nigeria) Ltd.	Lagos, Nigeria		100.0
CGG Airborne Survey (Pty) Ltd	Johannesburg, South Africa		100.0
Sercel England Ltd.	Edimburgh, United Kingdom		100.0
Sercel-GRC	Houston, United States		100.0
Optoplan AS	Trondheim, Norway		100.0
Sercel Inc.	Houston, United States		100.0
Sercel Canada Ltd.	Fredericton, Canada		100.0
Sercel Australia Pty Ltd	Sydney, Australia		100.0
Xian Sercel Petroleum Exploration Instrument Co. Ltd.	Xian, China		51.0
Sercel Beijing Technological Services Co. Ltd.	Beijing, China		100.0
Sercel Singapore Pte Ltd.	Singapore		100.0
De Regt Germany Gmbh	Dortmund, Germany		100.0

Each of our subsidiaries listed above is organised in the country or U.S. state in which its head office is located, and each such subsidiary does business under its registered name.