| Geyser | 1974-12-15 |
|---|---|
| Depression | 1302 ie |
| Grand | 1657 ie |
| Lion | 1145 ie, 1421 min |
| Old Faithful | 1155 short, 1237, 1407 short, 1444 long, 1608 short, 1653 long, 1814 short |
| Values for Old Faithful Area | 1974-12-15 |
|---|---|
| Astronomical Twilight Begin | 06:07 |
| Nautical Twilight Begin | 06:42 |
| Civil Twilight Begin | 07:19 |
| Sunrise | 07:52 |
| Sunset | 16:44 |
| Civil Twilight End | 17:17 |
| Nautical Twilight End | 17:54 |
| Astronomical Twilight End | 18:29 |
| Moon Illumination | 2.61% |