| Geyser | 1990-09-04 |
|---|---|
| Echinus | 0930, 1038 maj, 1220, 1300, 1445, 1540 |
| Fireball | 1015 |
| Occasional | 1157 ie |
| Whirligig | 0912 ie, 1425 |
| Values for Old Faithful Area | 1990-09-04 |
|---|---|
| Astronomical Twilight Begin | 05:06 |
| Nautical Twilight Begin | 05:44 |
| Civil Twilight Begin | 06:19 |
| Sunrise | 06:49 |
| Sunset | 19:55 |
| Civil Twilight End | 20:24 |
| Nautical Twilight End | 21:00 |
| Astronomical Twilight End | 21:37 |
| Moon Illumination | 99.18% |