| Geyser | 1971-05-11 |
|---|---|
| Beehive | 1024 |
| Castle | 1515 |
| North Goggle | 0915 |
| Old Faithful | 0825 long, 0935 short, 1024 long, 1144 short, 1231, 1352 long, 1508 short, 1557 long |
| Values for Old Faithful Area | 1971-05-11 |
|---|---|
| Astronomical Twilight Begin | 03:57 |
| Nautical Twilight Begin | 04:45 |
| Civil Twilight Begin | 05:27 |
| Sunrise | 06:00 |
| Sunset | 20:38 |
| Civil Twilight End | 21:11 |
| Nautical Twilight End | 21:53 |
| Astronomical Twilight End | 22:41 |
| Moon Illumination | 99.4% |