| Geyser | 1988-07-17 |
|---|---|
| Crater Spring | 1200 |
| Echinus | 0945, 1057, 1145, 1440 min, 1450 |
| Kaleidoscope | 1200 |
| Yellow Funnel Spring | 1200 |
| Values for Old Faithful Area | 1988-07-17 |
|---|---|
| Astronomical Twilight Begin | 03:40 |
| Nautical Twilight Begin | 04:34 |
| Civil Twilight Begin | 05:20 |
| Sunrise | 05:55 |
| Sunset | 21:03 |
| Civil Twilight End | 21:38 |
| Nautical Twilight End | 22:23 |
| Astronomical Twilight End | 23:18 |
| Moon Illumination | 10.07% |