| Geyser | 1988-06-21 |
|---|---|
| Echinus | 0500, 0900, 1000 maj, 1210, 1610 |
| Steamvalve Spring | 1800 |
| Values for Old Faithful Area | 1988-06-21 |
|---|---|
| Astronomical Twilight Begin | 03:09 |
| Nautical Twilight Begin | 04:13 |
| Civil Twilight Begin | 05:01 |
| Sunrise | 05:38 |
| Sunset | 21:11 |
| Civil Twilight End | 21:48 |
| Nautical Twilight End | 22:37 |
| Astronomical Twilight End | 23:40 |
| Moon Illumination | 38.92% |