| Date: | 2020-02-21 |
| Time: | 0137 E |
| Geyser: | Steamboat |
| Webcam: | No |
| Initial: | No |
| Major/Minor: | Major |
| Duration: | |
| Time Entered: | 2020-02-21 02:30:16 |
| Time Updated: | 2020-02-21 03:39:20 |
| Time Uploaded: | 2020-02-21 03:39:20 |
| Entrant: | Polly |
| Observer: | |
| Submitted to: | GeyserTimes for iOS |
| Comments: | Weak YNM signature. Tall spike on Tantalus Creek. |
| https://www.flickr.com/photos/jsjgeology/49565749137 | Norris Morris seismogram showing Steamboat Geyser's 1:37 AM major eruption on 20 February 2020. | |
| https://www.flickr.com/photos/jsjgeology/49565749202 | Tantalus Creek discharge graph showing Steamboat Geyser's 1:37 AM major eruption on 20 February 2020. |