| Geyser | 1975-12-12 |
|---|---|
| Little Squirt | 0000-2359 |
| Old Faithful | 0805 long, 0917 long, 1031 short, 1115 long, 1243 long, 1355 long, 1502 long |
| Values for Old Faithful Area | 1975-12-12 |
|---|---|
| Astronomical Twilight Begin | 06:04 |
| Nautical Twilight Begin | 06:40 |
| Civil Twilight Begin | 07:16 |
| Sunrise | 07:50 |
| Sunset | 16:43 |
| Civil Twilight End | 17:16 |
| Nautical Twilight End | 17:53 |
| Astronomical Twilight End | 18:29 |
| Moon Illumination | 65.51% |