| Geyser | 1973-01-21 |
|---|---|
| Beehive | 1000 |
| Castle | 1015 |
| Lion | 1101, 1505 |
| Old Faithful | 0826 long, 0933 short, 1026 long, 1137 short, 1231 long, 1342 short, 1430 long, 1545 short, 1640 long |
| Values for Old Faithful Area | 1973-01-21 |
|---|---|
| Astronomical Twilight Begin | 06:10 |
| Nautical Twilight Begin | 06:44 |
| Civil Twilight Begin | 07:20 |
| Sunrise | 07:52 |
| Sunset | 17:17 |
| Civil Twilight End | 17:49 |
| Nautical Twilight End | 18:24 |
| Astronomical Twilight End | 18:59 |
| Moon Illumination | 92.53% |