| Geyser | 1988-07-15 |
|---|---|
| Echinus | 0807 ie, 0840, 0930, 1037, 1143, 1308 |
| Ledge | 1132 |
| Steamvalve Spring | 0807, 1428 |
| Values for Old Faithful Area | 1988-07-15 |
|---|---|
| Astronomical Twilight Begin | 03:36 |
| Nautical Twilight Begin | 04:32 |
| Civil Twilight Begin | 05:18 |
| Sunrise | 05:53 |
| Sunset | 21:05 |
| Civil Twilight End | 21:40 |
| Nautical Twilight End | 22:26 |
| Astronomical Twilight End | 23:21 |
| Moon Illumination | 1.69% |