| Geyser | 1989-09-21 |
|---|---|
| Echinus | 1000, 1030, 1145, 1213, 1337, 1416 |
| Fireball | 1326 |
| Whirligig | 0951, 1334, 1415 |
| Values for Old Faithful Area | 1989-09-21 |
|---|---|
| Astronomical Twilight Begin | 05:31 |
| Nautical Twilight Begin | 06:06 |
| Civil Twilight Begin | 06:40 |
| Sunrise | 07:09 |
| Sunset | 19:22 |
| Civil Twilight End | 19:51 |
| Nautical Twilight End | 20:25 |
| Astronomical Twilight End | 21:00 |
| Moon Illumination | 59.43% |