Operating. . .
| Geyser: | Event Non-Geyser Related |
| Date/Time: | 2021-02-10 @ 0633 |
| Entrant: | JSJ |
| Observer: | |
| Time Entered: | 2021-02-10 11:12:34 |
| Time Uploaded: | 2021-02-10 11:12:34 |
| Submitted to: | Geysertimes.org |
| Note: | Shock waves from a magnitude 7.7 subduction zone earthquake that hit the New Hebrides Trench in the southwestern Pacific Ocean arrived at Yellowstone's seismic network, with surface wave signals between 0700 and 0800. |