| Geyser | 1978-07-25 |
|---|---|
| Blue | 1230 |
| Constant | 1020 |
| Echinus | 0935, 1220, 1335, 1558 |
| Palpitator Spring | 1200 |
| Veteran | 1525, 1640 min |
| Whirligig | 0820 |
| Values for Old Faithful Area | 1978-07-25 |
|---|---|
| Astronomical Twilight Begin | 03:53 |
| Nautical Twilight Begin | 04:44 |
| Civil Twilight Begin | 05:28 |
| Sunrise | 06:02 |
| Sunset | 20:57 |
| Civil Twilight End | 21:31 |
| Nautical Twilight End | 22:14 |
| Astronomical Twilight End | 23:05 |
| Moon Illumination | 67.49% |