| Geyser | 1976-03-31 |
|---|---|
| Vault | 2115 |
| Values for Old Faithful Area | 1976-03-31 |
|---|---|
| Astronomical Twilight Begin | 04:24 |
| Nautical Twilight Begin | 05:00 |
| Civil Twilight Begin | 05:35 |
| Sunrise | 06:05 |
| Sunset | 18:49 |
| Civil Twilight End | 19:18 |
| Nautical Twilight End | 19:53 |
| Astronomical Twilight End | 20:30 |
| Moon Illumination | 0.29% |