| Geyser | 1981-08-24 |
|---|---|
| Arsenic | 1219 |
| Fireball | 1651 |
| Graceful | 1636, 1805, 1830, 1854, 1919, 1944 |
| Splutter Pot | 1208, 1445 |
| Values for Old Faithful Area | 1981-08-24 |
|---|---|
| Astronomical Twilight Begin | 04:49 |
| Nautical Twilight Begin | 05:29 |
| Civil Twilight Begin | 06:06 |
| Sunrise | 06:36 |
| Sunset | 20:14 |
| Civil Twilight End | 20:44 |
| Nautical Twilight End | 21:21 |
| Astronomical Twilight End | 22:01 |
| Moon Illumination | 31.64% |