| Geyser | 1987-07-13 |
|---|---|
| Bear Den | 1200 |
| Echinus | 1145 maj, 1540 maj |
| Emerald Spring | 1200 |
| Steamvalve Spring | 1200 A, 1700 |
| Values for Old Faithful Area | 1987-07-13 |
|---|---|
| Astronomical Twilight Begin | 03:32 |
| Nautical Twilight Begin | 04:29 |
| Civil Twilight Begin | 05:15 |
| Sunrise | 05:50 |
| Sunset | 21:07 |
| Civil Twilight End | 21:42 |
| Nautical Twilight End | 22:28 |
| Astronomical Twilight End | 23:25 |
| Moon Illumination | 93.34% |