 HOUSTON, March 30, 2021 GLOBE NEWSWIRE -- ION Geophysical Corporation NYSE: IO today announced that the Company has now finalized plans to launch the second phase of its North Sea 3D multi-client program, following on from Phase 1, which commenced in August 2020. The field data for this latest addition will be collected from approximately late April to mid-October. Located in a highly productive hydrocarbon province, the Mid North Sea High survey covers one of the few underexplored areas offshore the UK, which has garnered significant interest from recent play-opening wells with attractive development costs. Most of the 11,000 sq km survey will be acquired this summer, covering an area six times larger than the initial phase. Since the program launched last August, additional underwriting was secured and additional acreage was awarded within the survey area, further validating the programs merits and expanding the potential client base for this new data asset. 