| Geyser | 1978-12-14 |
|---|---|
| Cistern Spring | 1200 |
| Congress Pool | 1200 |
| Emerald Spring | 1200 |
| Fan-Norris | 1200 |
| Harding | 1200 |
| Values for Old Faithful Area | 1978-12-14 |
|---|---|
| Astronomical Twilight Begin | 06:06 |
| Nautical Twilight Begin | 06:41 |
| Civil Twilight Begin | 07:18 |
| Sunrise | 07:51 |
| Sunset | 16:44 |
| Civil Twilight End | 17:17 |
| Nautical Twilight End | 17:54 |
| Astronomical Twilight End | 18:29 |
| Moon Illumination | 99.95% |