| Geyser | 1990-09-27 |
|---|---|
| Blue | 1200 |
| Crater Spring | 1200 |
| Echinus | 0838 maj, 1050, 1144, 1449 |
| Fearless | 1200 |
| Fireball | 1348 |
| Hurricane Vent | 1200 |
| Incline | 1200 |
| Little Whirligig | 1408 |
| Yellow Funnel Spring | 1200 |
| Values for Old Faithful Area | 1990-09-27 |
|---|---|
| Astronomical Twilight Begin | 05:39 |
| Nautical Twilight Begin | 06:13 |
| Civil Twilight Begin | 06:47 |
| Sunrise | 07:16 |
| Sunset | 19:12 |
| Civil Twilight End | 19:40 |
| Nautical Twilight End | 20:14 |
| Astronomical Twilight End | 20:49 |
| Moon Illumination | 51.6% |