| Geyser | 1980-09-27 |
|---|---|
| Bear Den | 1800 |
| Echinus | 1214:47, 1441 |
| Moxie | 1800 |
| Whirligig | 0955, 1105, 1602, 1641 |
| Values for Old Faithful Area | 1980-09-27 |
|---|---|
| Astronomical Twilight Begin | 05:39 |
| Nautical Twilight Begin | 06:14 |
| Civil Twilight Begin | 06:48 |
| Sunrise | 07:16 |
| Sunset | 19:11 |
| Civil Twilight End | 19:40 |
| Nautical Twilight End | 20:14 |
| Astronomical Twilight End | 20:48 |
| Moon Illumination | 88.87% |