| Geyser | 1978-08-17 |
|---|---|
| Dark Cavern | 1250 |
| Echinus | 1003, 1134, 1434, 1603 |
| Splutter Pot | 1235 |
| Whirligig | 0845, 1245 |
| Values for Old Faithful Area | 1978-08-17 |
|---|---|
| Astronomical Twilight Begin | 04:36 |
| Nautical Twilight Begin | 05:18 |
| Civil Twilight Begin | 05:57 |
| Sunrise | 06:28 |
| Sunset | 20:26 |
| Civil Twilight End | 20:57 |
| Nautical Twilight End | 21:35 |
| Astronomical Twilight End | 22:18 |
| Moon Illumination | 97.87% |