| Geyser | 1981-08-05 |
|---|---|
| Dark Cavern | 1527 |
| Dog's Leg Spring | 1800 |
| Morning | 0700, 2140 |
| Rubble | 1800 |
| UNNG-NBK-8 | 1200 |
| Veteran | 1212, 1343, 1548, 2039 |
| Whirligig | 1527, 1559 |
| Values for Old Faithful Area | 1981-08-05 |
|---|---|
| Astronomical Twilight Begin | 04:15 |
| Nautical Twilight Begin | 05:01 |
| Civil Twilight Begin | 05:42 |
| Sunrise | 06:14 |
| Sunset | 20:43 |
| Civil Twilight End | 21:16 |
| Nautical Twilight End | 21:57 |
| Astronomical Twilight End | 22:43 |
| Moon Illumination | 26.34% |