| Geyser | 1971-05-01 |
|---|---|
| Beehive | 1355 |
| Castle | 1630 |
| Old Faithful | 0910 long, 1020 short, 1118 long, 1332 long, 1457 short, 1539 long, 1653 short |
| Vent | 1300 ie |
| Values for Old Faithful Area | 1971-05-01 |
|---|---|
| Astronomical Twilight Begin | 04:18 |
| Nautical Twilight Begin | 05:02 |
| Civil Twilight Begin | 05:42 |
| Sunrise | 06:14 |
| Sunset | 20:26 |
| Civil Twilight End | 20:58 |
| Nautical Twilight End | 21:38 |
| Astronomical Twilight End | 22:22 |
| Moon Illumination | 39.44% |