| Geyser | 1990-07-31 |
|---|---|
| Echinus | 1044, 1155, 1304, 1412, 1515 maj |
| Fireball | 1044, 1154, 1305 ie, 1433 |
| Incline | 1930 A |
| Whirligig | 1204 |
| Values for Old Faithful Area | 1990-07-31 |
|---|---|
| Astronomical Twilight Begin | 04:05 |
| Nautical Twilight Begin | 04:53 |
| Civil Twilight Begin | 05:35 |
| Sunrise | 06:09 |
| Sunset | 20:50 |
| Civil Twilight End | 21:23 |
| Nautical Twilight End | 22:05 |
| Astronomical Twilight End | 22:54 |
| Moon Illumination | 65.58% |