 HOUSTON, July 15, 2021 GLOBE NEWSWIRE -- ION Geophysical Corporation NYSE: IO today announced that the Company expects second quarter 2021 revenues to be approximately 20 million, an improvement of approximately 40 sequentially or a decrease of 13 from the prior period. At quarter end, the Companys total liquidity of approximately 33 million consisted of 27 million of cash including net revolver borrowings of 20 million and approximately 6 million of remaining available borrowing capacity under the revolving credit facility. Backlog is estimated to be 14 million as the Companys Mid North Sea High 3D multi-client program in the North Sea proceeded ahead of schedule this quarter, leveraging the Companys proprietary MarlinTM and Orca digital technologies to acquire the survey in a more efficient, eco-friendly manner. 