| Geyser | 1975-12-23 |
|---|---|
| Beehive | 1010 |
| Beehive's Indicator | 0949 ie |
| Castle | 1348 ie |
| Dome | 1351 ie, 1443 |
| Little Squirt | 1200-2359 |
| Lone Star | 1315 |
| Old Faithful | 0950 short, 1101, 1207, 1327 short, 1443 short, 1533 long |
| Values for Old Faithful Area | 1975-12-23 |
|---|---|
| Astronomical Twilight Begin | 06:11 |
| Nautical Twilight Begin | 06:47 |
| Civil Twilight Begin | 07:23 |
| Sunrise | 07:57 |
| Sunset | 16:47 |
| Civil Twilight End | 17:20 |
| Nautical Twilight End | 17:57 |
| Astronomical Twilight End | 18:32 |
| Moon Illumination | 75.43% |