 HOUSTON, Sept. 09, 2021 GLOBE NEWSWIRE -- ION Geophysical Corporation NYSE: IO today announced a third, fully underwritten phase of the Companys Mid North Sea High 3D new acquisition multi-client program. The Mid North Sea High program covers one of the few remaining underexplored areas offshore the UK, where relatively low development costs close to shore make it attractive for future investment. Adjacent to the initial phase, the survey location fills a gap in existing subsurface coverage and is strategically important to expanding IONs regional footprint. Data collection of the 700 sq km industry-supported survey is expected to occur from mid-September until late October. 