| Geyser | 1971-01-23 |
|---|---|
| Bijou | 1430 |
| Castle | 1405 |
| Lion | 1415, 1427 |
| Old Faithful | 1056 short, 1143 long, 1257 short, 1402 short, 1512 long, 1631 short |
| Values for Old Faithful Area | 1971-01-23 |
|---|---|
| Astronomical Twilight Begin | 06:09 |
| Nautical Twilight Begin | 06:43 |
| Civil Twilight Begin | 07:19 |
| Sunrise | 07:50 |
| Sunset | 17:19 |
| Civil Twilight End | 17:51 |
| Nautical Twilight End | 18:26 |
| Astronomical Twilight End | 19:01 |
| Moon Illumination | 16.89% |