| Geyser | 1972-12-23 |
|---|---|
| Beehive | 1255 |
| Grand | 0330, 1130 |
| Lion | 1326, 1607 |
| Old Faithful | 0858, 1009, 1101, 1214, 1309, 1427, 1519, 1633 |
| Riverside | 1130 |
| Values for Old Faithful Area | 1972-12-23 |
|---|---|
| Astronomical Twilight Begin | 06:12 |
| Nautical Twilight Begin | 06:47 |
| Civil Twilight Begin | 07:24 |
| Sunrise | 07:57 |
| Sunset | 16:47 |
| Civil Twilight End | 17:21 |
| Nautical Twilight End | 17:57 |
| Astronomical Twilight End | 18:33 |
| Moon Illumination | 88.61% |