| Geyser | 1987-07-14 |
|---|---|
| Constant | 1725 |
| Steamvalve Spring | 1800 |
| Values for Old Faithful Area | 1987-07-14 |
|---|---|
| Astronomical Twilight Begin | 03:33 |
| Nautical Twilight Begin | 04:30 |
| Civil Twilight Begin | 05:16 |
| Sunrise | 05:51 |
| Sunset | 21:06 |
| Civil Twilight End | 21:41 |
| Nautical Twilight End | 22:27 |
| Astronomical Twilight End | 23:24 |
| Moon Illumination | 86.11% |