| Geyser | 1978-09-27 |
|---|---|
| Arsenic | 1525 ie |
| Constant | 1611 ie |
| Dark Cavern | 1525 ie |
| Echinus | 1540 |
| Fireball | 1525 ie, 1710 ie |
| Splutter Pot | 1525 ie |
| Whirligig | 1611 ie |
| Values for Old Faithful Area | 1978-09-27 |
|---|---|
| Astronomical Twilight Begin | 05:39 |
| Nautical Twilight Begin | 06:13 |
| Civil Twilight Begin | 06:47 |
| Sunrise | 07:16 |
| Sunset | 19:12 |
| Civil Twilight End | 19:41 |
| Nautical Twilight End | 20:15 |
| Astronomical Twilight End | 20:49 |
| Moon Illumination | 22.83% |