| Geyser | 1978-07-17 |
|---|---|
| Blue | 0900 |
| Echinus | 0930, 1202, 1555 |
| Splutter Pot | 0900, 0900 ie |
| Whirligig | 0856 |
| Values for Old Faithful Area | 1978-07-17 |
|---|---|
| Astronomical Twilight Begin | 03:39 |
| Nautical Twilight Begin | 04:34 |
| Civil Twilight Begin | 05:19 |
| Sunrise | 05:54 |
| Sunset | 21:04 |
| Civil Twilight End | 21:39 |
| Nautical Twilight End | 22:24 |
| Astronomical Twilight End | 23:19 |
| Moon Illumination | 87.8% |