Deciding. . .
| Geyser: | Event Non-Geyser Related |
| Date/Time: | 2021-12-20 @ 1313 |
| Entrant: | JSJ |
| Observer: | |
| Time Entered: | 2021-12-20 14:17:55 |
| Time Updated: | 2021-12-20 14:18:23 |
| Time Uploaded: | 2021-12-20 14:18:23 |
| Submitted to: | Geysertimes.org |
| Note: | Shock waves from a magnitude 6.2 earthquake that hit offshore northern California arrived at Yellowstone's seismic network. |