| Geyser | 1978-07-31 |
|---|---|
| Dabble | 1200 |
| Echinus | 1525 |
| Palpitator Spring | 1200 |
| Splutter Pot | 0950 |
| Steamboat | 1545 |
| Whirligig | 0930 |
| Values for Old Faithful Area | 1978-07-31 |
|---|---|
| Astronomical Twilight Begin | 04:05 |
| Nautical Twilight Begin | 04:53 |
| Civil Twilight Begin | 05:35 |
| Sunrise | 06:09 |
| Sunset | 20:50 |
| Civil Twilight End | 21:23 |
| Nautical Twilight End | 22:05 |
| Astronomical Twilight End | 22:54 |
| Moon Illumination | 12.57% |