| Date: | 2021-03-18 |
| Time: | 0344 E |
| Geyser: | Steamboat |
| Webcam: | No |
| Initial: | No |
| Major/Minor: | Major |
| Duration: | |
| Time Entered: | 2021-03-18 04:21:08 |
| Time Updated: | 2021-03-18 04:29:24 |
| Time Uploaded: | 2021-03-18 04:29:25 |
| Entrant: | Polly |
| Observer: | YNM & YNR seismographs |
| Submitted to: | |
| Comments: |
| https://www.flickr.com/photos/jsjgeology/51049032096 | Norris Museum seismogram showing Steamboat Geyser's 3:44 AM major eruption on 18 March 2021. | |
| https://www.flickr.com/photos/jsjgeology/51049356231 | Tantalus Creek discharge graph showing Steamboat Geyser's 3:44 AM major eruption on 18 March 2021. |