| Geyser | 1980-09-30 |
|---|---|
| Bear Den | 1127 ie |
| Echinus | 1012 ie, 1035, 1107 |
| Splutter Pot | 1223 ie |
| Valentine | 0000 A |
| Veteran | 1050 A |
| Whirligig | 1032, 1122, 1220 |
| Values for Old Faithful Area | 1980-09-30 |
|---|---|
| Astronomical Twilight Begin | 05:43 |
| Nautical Twilight Begin | 06:17 |
| Civil Twilight Begin | 06:51 |
| Sunrise | 07:20 |
| Sunset | 19:05 |
| Civil Twilight End | 19:34 |
| Nautical Twilight End | 20:08 |
| Astronomical Twilight End | 20:42 |
| Moon Illumination | 59.77% |