| Geyser | 1978-07-23 |
|---|---|
| Blue | 1350 |
| Constant | 1350, 1525, 1545, 1605 |
| Dark Cavern | 1410, 1515, 1520, 1525, 1540, 1550, 1600, 1605 |
| Echinus | 0906, 1030, 1152, 1551 |
| Splutter Pot | 0920, 1550 |
| Whirligig | 0845, 0920, 1400, 1510, 1550 |
| Values for Old Faithful Area | 1978-07-23 |
|---|---|
| Astronomical Twilight Begin | 03:49 |
| Nautical Twilight Begin | 04:42 |
| Civil Twilight Begin | 05:26 |
| Sunrise | 06:00 |
| Sunset | 20:59 |
| Civil Twilight End | 21:33 |
| Nautical Twilight End | 22:17 |
| Astronomical Twilight End | 23:09 |
| Moon Illumination | 86.21% |