| Geyser | 1990-04-27 |
|---|---|
| Congress Pool | 1200 |
| Crater Spring | 1200 |
| Hurricane Vent | 1200 |
| Pinwheel | 1200 |
| Steamboat | 1200 |
| Values for Old Faithful Area | 1990-04-27 |
|---|---|
| Astronomical Twilight Begin | 04:26 |
| Nautical Twilight Begin | 05:09 |
| Civil Twilight Begin | 05:47 |
| Sunrise | 06:19 |
| Sunset | 20:22 |
| Civil Twilight End | 20:53 |
| Nautical Twilight End | 21:32 |
| Astronomical Twilight End | 22:15 |
| Moon Illumination | 6.43% |