| Geyser | 1973-02-28 |
|---|---|
| Beehive | 1530 |
| Castle | 0845 |
| Old Faithful | 0829 short, 0920 long, 1031 short, 1141 long, 1254 short, 1340 long, 1454 short, 1540 long, 1651 long |
| Riverside | 1000 |
| Values for Old Faithful Area | 1973-02-28 |
|---|---|
| Astronomical Twilight Begin | 05:25 |
| Nautical Twilight Begin | 05:59 |
| Civil Twilight Begin | 06:32 |
| Sunrise | 07:01 |
| Sunset | 18:09 |
| Civil Twilight End | 18:38 |
| Nautical Twilight End | 19:12 |
| Astronomical Twilight End | 19:46 |
| Moon Illumination | 21.82% |