| Geyser | 1981-07-24 |
|---|---|
| Basin | 1217 |
| Dark Cavern | 1219 |
| Echinus | 1046, 1145:24, 1242:12, 1326:07, 1436:57, 1930 |
| Guardian | 1203 |
| Morning | 0245 ie, 2200 |
| Moxie | 1214 |
| Valentine | 1213:30 |
| Whirligig | 1204, 1237, 2019 |
| Values for Old Faithful Area | 1981-07-24 |
|---|---|
| Astronomical Twilight Begin | 03:52 |
| Nautical Twilight Begin | 04:43 |
| Civil Twilight Begin | 05:27 |
| Sunrise | 06:01 |
| Sunset | 20:57 |
| Civil Twilight End | 21:31 |
| Nautical Twilight End | 22:15 |
| Astronomical Twilight End | 23:07 |
| Moon Illumination | 51.82% |