| Geyser | 1978-08-31 |
|---|---|
| Cistern Spring | 0900 |
| Dark Cavern | 0840, 1540 |
| Echinus | 1102, 1350, 1511, 1925 |
| Ledge | 0300 A |
| Palpitator Spring | 1200 |
| Porkchop | 0935 ie |
| Splutter Pot | 0835, 1430 |
| Whirligig | 0835, 1445, 1535 |
| Values for Old Faithful Area | 1978-08-31 |
|---|---|
| Astronomical Twilight Begin | 05:00 |
| Nautical Twilight Begin | 05:38 |
| Civil Twilight Begin | 06:14 |
| Sunrise | 06:44 |
| Sunset | 20:02 |
| Civil Twilight End | 20:32 |
| Nautical Twilight End | 21:08 |
| Astronomical Twilight End | 21:46 |
| Moon Illumination | 5.5% |