| Date | Event |
| 20-Nov-09 | Price hit new 52-week high ($6.05) |
| 18-Nov-09 | Price hit new 52-week high ($5.84) |
| 10-Nov-09 | Price hit new 52-week high ($5.61) |
| 5-Nov-09 | ION Geophysical Corporation Earnings Call scheduled for 10:00 am ET today |
| 4-Nov-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Results of Operations and Financial Condition |
| 4-Nov-09 | Earnings announcement |
| 27-Oct-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Entry into a Material Definitive Agreement |
| 15-Oct-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Other Events |
| 8-Oct-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Other Events |
| 6-Oct-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Regulation FD Disclosure |
| 6-Aug-09 | ION Geophysical Corporation Earnings Call scheduled for 10:00 am ET today |
| 6-Aug-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Results of Operations and Financial Condition |
| 1-Jul-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Entry into a Material Definitive Agreement |
| 22-Jun-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Other Events |
| 15-Jun-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Termination of a Material Definitive Agreement |
| 5-Jun-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Regulation FD Disclosure |
| 2-Jun-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Entry into a Material Definitive Agreement, Creation of a Direct Financial O |
| 29-May-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Regulation FD Disclosure |
| 6-May-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Results of Operations and Financial Condition |
| 1-Apr-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Change in Directors or Principal Officers |
| 24-Mar-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Regulation FD Disclosure |
| 4-Mar-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Change in Directors or Principal Officers |
| 3-Mar-09 | Price hit new 52-week low ($0.83) |
| 2-Mar-09 | ION GEOPHYSICAL CORP Files SEC form 10-K, Annual Report |
| 27-Feb-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Results of Operations and Financial Condition |
| 27-Feb-09 | Price hit new 52-week low ($0.90) |
| 20-Feb-09 | Price hit new 52-week low ($1.18) |
| 29-Jan-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Change in Directors or Principal Officers |
| 9-Jan-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Regulation FD Disclosure |
| 5-Jan-09 | ION GEOPHYSICAL CORP Files SEC form 8-K, Material Modification to Rights of Security Holders |
| 5-Dec-08 | ION GEOPHYSICAL CORP Files SEC form 8-K, Change in Directors or Principal Officers |
| 4-Dec-08 | ION GEOPHYSICAL CORP Files SEC form 8-K, Material Modification to Rights of Security Holders |
| 20-Nov-08 | ION GEOPHYSICAL CORP Files SEC form 8-K, Change in Directors or Principal Officers |
| 14-Nov-08 | ION GEOPHYSICAL CORP Files SEC form 8-K, Regulation FD Disclosure |
| 7-Nov-08 | ION GEOPHYSICAL CORP Files SEC form 10-Q, Quarterly Report |
| 4-Nov-08 | ION GEOPHYSICAL CORP Files SEC form 8-K, Results of Operations and Financial Condition |
| 3-Nov-08 | ION GEOPHYSICAL CORP Files SEC form 8-K/A, Financial Statements and Exhibits |