| Geyser | 1980-08-15 |
|---|---|
| Bear Den | 1615 |
| Constant | 1345 |
| Echinus | 1015, 1049, 1156 |
| Little Whirligig | 0000 |
| Whirligig | 0855, 1332 ie, 1520, 1615 |
| Values for Old Faithful Area | 1980-08-15 |
|---|---|
| Astronomical Twilight Begin | 04:33 |
| Nautical Twilight Begin | 05:16 |
| Civil Twilight Begin | 05:55 |
| Sunrise | 06:26 |
| Sunset | 20:28 |
| Civil Twilight End | 21:00 |
| Nautical Twilight End | 21:38 |
| Astronomical Twilight End | 22:21 |
| Moon Illumination | 17.71% |