Thinking. . .
| Geyser: | Event Non-Geyser Related |
| Date/Time: | 2021-08-22 @ 1552 |
| Entrant: | JSJ |
| Observer: | |
| Time Entered: | 2021-08-22 16:23:50 |
| Time Updated: | 2021-08-22 19:21:17 |
| Time Uploaded: | 2021-08-22 19:21:18 |
| Submitted to: | |
| Note: | Shock waves from a magnitude 7.1 earthquake that hit the South Sandwich Trench area in the far-southern Atlantic Ocean arrived at Yellowstone's seismic network. Waves took ~19 minutes to get here. |