| Geyser | 1981-08-12 |
|---|---|
| Blue | 1315-1415 |
| Echinus | 1035 ie, 1225 min, 1233, 1524 min, 1533 min, 1545 maj |
| Morning | 0847, 1715 |
| Values for Old Faithful Area | 1981-08-12 |
|---|---|
| Astronomical Twilight Begin | 04:28 |
| Nautical Twilight Begin | 05:11 |
| Civil Twilight Begin | 05:51 |
| Sunrise | 06:22 |
| Sunset | 20:33 |
| Civil Twilight End | 21:05 |
| Nautical Twilight End | 21:44 |
| Astronomical Twilight End | 22:28 |
| Moon Illumination | 87.7% |