| Geyser | 1979-09-30 |
|---|---|
| Echinus | 1102, 1440 maj |
| Little Whirligig | 1130 ie |
| Whirligig | 1130 ie |
| Values for Old Faithful Area | 1979-09-30 |
|---|---|
| Astronomical Twilight Begin | 05:42 |
| Nautical Twilight Begin | 06:16 |
| Civil Twilight Begin | 06:50 |
| Sunrise | 07:19 |
| Sunset | 19:07 |
| Civil Twilight End | 19:36 |
| Nautical Twilight End | 20:09 |
| Astronomical Twilight End | 20:44 |
| Moon Illumination | 61.75% |