| Geyser | 1971-05-12 |
|---|---|
| Beehive | 0800 |
| Castle | 0820, 1640 |
| Lion | 0825, 0901, 1100, 1352 |
| Old Faithful | 0900 short, 0947 long, 1102 short, 1145 long, 1305, 1406 long, 1520 |
| Pink Cone | 0851 |
| Riverside | 0850 ie |
| Values for Old Faithful Area | 1971-05-12 |
|---|---|
| Astronomical Twilight Begin | 03:55 |
| Nautical Twilight Begin | 04:44 |
| Civil Twilight Begin | 05:26 |
| Sunrise | 05:59 |
| Sunset | 20:39 |
| Civil Twilight End | 21:13 |
| Nautical Twilight End | 21:55 |
| Astronomical Twilight End | 22:43 |
| Moon Illumination | 96.79% |