| Geyser | 1971-05-25 |
|---|---|
| Beehive | 1825 |
| Castle | 1215 |
| Grand | 0945 |
| Old Faithful | 0824 short, 0912 long, 1026 short, 1135 short, 1342 short, 1450 long, 1601 short, 1658 long |
| Values for Old Faithful Area | 1971-05-25 |
|---|---|
| Astronomical Twilight Begin | 03:31 |
| Nautical Twilight Begin | 04:26 |
| Civil Twilight Begin | 05:11 |
| Sunrise | 05:46 |
| Sunset | 20:53 |
| Civil Twilight End | 21:28 |
| Nautical Twilight End | 22:13 |
| Astronomical Twilight End | 23:08 |
| Moon Illumination | 0.7% |