| Geyser | 1978-09-25 |
|---|---|
| Bear Den | 1055 |
| Cistern Spring | 1200 |
| Echinus | 0950 |
| Mystic Spring | 1200 |
| Palpitator Spring | 1200 |
| Whirligig | 1100, 1545 |
| Values for Old Faithful Area | 1978-09-25 |
|---|---|
| Astronomical Twilight Begin | 05:36 |
| Nautical Twilight Begin | 06:11 |
| Civil Twilight Begin | 06:45 |
| Sunrise | 07:13 |
| Sunset | 19:16 |
| Civil Twilight End | 19:44 |
| Nautical Twilight End | 20:18 |
| Astronomical Twilight End | 20:53 |
| Moon Illumination | 40.27% |