| Geyser | 1978-09-04 |
|---|---|
| Blue | 1200 |
| Constant | 1000, 1540 |
| Echinus | 1512 |
| Guardian | 1450 |
| Little Whirligig | 1000 |
| Morning | 1859 |
| Splutter Pot | 1000 |
| Whirligig | 1445, 1535 |
| Values for Old Faithful Area | 1978-09-04 |
|---|---|
| Astronomical Twilight Begin | 05:06 |
| Nautical Twilight Begin | 05:44 |
| Civil Twilight Begin | 06:19 |
| Sunrise | 06:49 |
| Sunset | 19:55 |
| Civil Twilight End | 20:24 |
| Nautical Twilight End | 21:00 |
| Astronomical Twilight End | 21:38 |
| Moon Illumination | 2.45% |