| Geyser | 1987-07-24 |
|---|---|
| Echinus | 1145 maj, 1601 maj |
| Values for Old Faithful Area | 1987-07-24 |
|---|---|
| Astronomical Twilight Begin | 03:51 |
| Nautical Twilight Begin | 04:43 |
| Civil Twilight Begin | 05:27 |
| Sunrise | 06:01 |
| Sunset | 20:58 |
| Civil Twilight End | 21:32 |
| Nautical Twilight End | 22:16 |
| Astronomical Twilight End | 23:08 |
| Moon Illumination | 2.35% |