| Geyser | 1989-07-31 |
|---|---|
| Constant | 1424 |
| Echinus | 1035, 1123, 1216, 1310, 1403 maj, 1540, 1630 |
| Scummy Pool | 1320 |
| Values for Old Faithful Area | 1989-07-31 |
|---|---|
| Astronomical Twilight Begin | 04:05 |
| Nautical Twilight Begin | 04:54 |
| Civil Twilight Begin | 05:36 |
| Sunrise | 06:09 |
| Sunset | 20:49 |
| Civil Twilight End | 21:23 |
| Nautical Twilight End | 22:05 |
| Astronomical Twilight End | 22:53 |
| Moon Illumination | 2.26% |