| Geyser | 1901-12-13 |
|---|---|
| Giant | 1345 |
| Giant Hot Period | 1345, 1345 |
| Sawmill | 1345 |
| Sponge | 1345 |
| Values for Old Faithful Area | 1901-12-13 |
|---|---|
| Astronomical Twilight Begin | 06:05 |
| Nautical Twilight Begin | 06:41 |
| Civil Twilight Begin | 07:17 |
| Sunrise | 07:51 |
| Sunset | 16:44 |
| Civil Twilight End | 17:17 |
| Nautical Twilight End | 17:53 |
| Astronomical Twilight End | 18:29 |
| Moon Illumination | 4.4% |