| Geyser | 1976-12-30 |
|---|---|
| Dome | 0000-2359 |
| Old Faithful | 0847, 1001 short, 1055 long, 1222 short, 1310 long, 1423 long, 1534 long |
| Riverside | 1115 |
| Values for Old Faithful Area | 1976-12-30 |
|---|---|
| Astronomical Twilight Begin | 06:14 |
| Nautical Twilight Begin | 06:49 |
| Civil Twilight Begin | 07:26 |
| Sunrise | 07:59 |
| Sunset | 16:52 |
| Civil Twilight End | 17:25 |
| Nautical Twilight End | 18:02 |
| Astronomical Twilight End | 18:38 |
| Moon Illumination | 68.15% |