| Geyser | 1991-08-25 |
|---|---|
| Echinus | 0945, 1040, 1220, 1308, 1406 maj, 1550 |
| Morning | 0150 E, 0500 E, 0844, 1222, 1706, 2112 |
| Veteran | 1010 |
| Values for Old Faithful Area | 1991-08-25 |
|---|---|
| Astronomical Twilight Begin | 04:50 |
| Nautical Twilight Begin | 05:30 |
| Civil Twilight Begin | 06:07 |
| Sunrise | 06:37 |
| Sunset | 20:13 |
| Civil Twilight End | 20:43 |
| Nautical Twilight End | 21:20 |
| Astronomical Twilight End | 22:00 |
| Moon Illumination | 99.98% |