| Geyser | 1981-08-08 |
|---|---|
| Echinus | 1200, 1605 min, 1620 min, 1627 |
| Emerald Spring | 1200 |
| Incline | 1200 |
| Morning | 0006, 0856, 1630 |
| Rubble | 0800 A |
| Values for Old Faithful Area | 1981-08-08 |
|---|---|
| Astronomical Twilight Begin | 04:20 |
| Nautical Twilight Begin | 05:05 |
| Civil Twilight Begin | 05:46 |
| Sunrise | 06:18 |
| Sunset | 20:39 |
| Civil Twilight End | 21:11 |
| Nautical Twilight End | 21:51 |
| Astronomical Twilight End | 22:37 |
| Moon Illumination | 54.15% |