| Geyser | 1977-06-25 |
|---|---|
| Bear Den | 2125 |
| Constant | 1546 |
| Echinus | 0900, 1000, 1431 |
| Little Whirligig | 1500 A |
| Whirligig | 1525 |
| Values for Old Faithful Area | 1977-06-25 |
|---|---|
| Astronomical Twilight Begin | 03:11 |
| Nautical Twilight Begin | 04:14 |
| Civil Twilight Begin | 05:03 |
| Sunrise | 05:39 |
| Sunset | 21:12 |
| Civil Twilight End | 21:48 |
| Nautical Twilight End | 22:37 |
| Astronomical Twilight End | 23:40 |
| Moon Illumination | 57.93% |