| Geyser | 1971-05-13 |
|---|---|
| Beehive | 1617 |
| Castle | 0953 |
| Grand | 0940 ie |
| Grotto | 1020 |
| Old Faithful | 0933 long, 1040 long, 1155 short, 1253 long, 1404 short, 1459 short, 1618 short |
| Values for Old Faithful Area | 1971-05-13 |
|---|---|
| Astronomical Twilight Begin | 03:53 |
| Nautical Twilight Begin | 04:42 |
| Civil Twilight Begin | 05:24 |
| Sunrise | 05:58 |
| Sunset | 20:40 |
| Civil Twilight End | 21:14 |
| Nautical Twilight End | 21:56 |
| Astronomical Twilight End | 22:45 |
| Moon Illumination | 92.14% |