| Geyser | 1988-04-16 |
|---|---|
| Deep Blue | 1841, 1904, 1924 |
| Kaleidoscope | 1823, 1903, 1935 |
| Other Geyser | 1855 |
| Values for Old Faithful Area | 1988-04-16 |
|---|---|
| Astronomical Twilight Begin | 04:49 |
| Nautical Twilight Begin | 05:29 |
| Civil Twilight Begin | 06:06 |
| Sunrise | 06:36 |
| Sunset | 20:09 |
| Civil Twilight End | 20:39 |
| Nautical Twilight End | 21:16 |
| Astronomical Twilight End | 21:56 |
| Moon Illumination | 0.08% |