| Geyser | 1973-01-18 |
|---|---|
| Old Faithful | 0823 short, 0908 long, 1018 long, 1121 long, 1224 short, 1319 long, 1434 short, 1534 long, 1651 short |
| Values for Old Faithful Area | 1973-01-18 |
|---|---|
| Astronomical Twilight Begin | 06:11 |
| Nautical Twilight Begin | 06:46 |
| Civil Twilight Begin | 07:22 |
| Sunrise | 07:54 |
| Sunset | 17:13 |
| Civil Twilight End | 17:45 |
| Nautical Twilight End | 18:21 |
| Astronomical Twilight End | 18:55 |
| Moon Illumination | 99.5% |