| Geyser | 1978-08-15 |
|---|---|
| Arsenic | 1120 |
| Constant | 0830 |
| Echinus | 0920, 1045 |
| Palpitator Spring | 1200 |
| Splutter Pot | 0830 |
| Veteran | 0930 |
| Whirligig | 0830, 0910 |
| Values for Old Faithful Area | 1978-08-15 |
|---|---|
| Astronomical Twilight Begin | 04:33 |
| Nautical Twilight Begin | 05:15 |
| Civil Twilight Begin | 05:54 |
| Sunrise | 06:26 |
| Sunset | 20:29 |
| Civil Twilight End | 21:00 |
| Nautical Twilight End | 21:39 |
| Astronomical Twilight End | 22:22 |
| Moon Illumination | 85.45% |