| Geyser | 1979-08-15 |
|---|---|
| Arsenic | 1800 |
| Bear Den | 1617 |
| Constant | 1030 A |
| Echinus | 1251, 1416 |
| Little Whirligig | 1000 ie |
| Whirligig | 1030 |
| Values for Old Faithful Area | 1979-08-15 |
|---|---|
| Astronomical Twilight Begin | 04:32 |
| Nautical Twilight Begin | 05:15 |
| Civil Twilight Begin | 05:54 |
| Sunrise | 06:25 |
| Sunset | 20:29 |
| Civil Twilight End | 21:01 |
| Nautical Twilight End | 21:40 |
| Astronomical Twilight End | 22:22 |
| Moon Illumination | 45.15% |