| Geyser | 1988-01-21 |
|---|---|
| Cascade | 0950, 1022, 1043, 1100, 1121, 1153, 1214, 1242, 1319, 1345, 1412, 1506, 1603, 1709, 1823 |
| Values for Old Faithful Area | 1988-01-21 |
|---|---|
| Astronomical Twilight Begin | 06:10 |
| Nautical Twilight Begin | 06:45 |
| Civil Twilight Begin | 07:20 |
| Sunrise | 07:52 |
| Sunset | 17:16 |
| Civil Twilight End | 17:48 |
| Nautical Twilight End | 18:23 |
| Astronomical Twilight End | 18:58 |
| Moon Illumination | 6.3% |