 HOUSTON, Feb. 08, 2021 GLOBE NEWSWIRE -- ION Geophysical Corporation NYSE: IO today announced that it will release its fourth quarter 2020 financial results on Wednesday, February 10, 2021 after the market closes. In conjunction with the release, ION has scheduled a conference call, which will be broadcast live over the Internet, on Thursday, February 11 at 10:00 a.m. Eastern Time 9:00 a.m. Central Time. 