| Geyser | 1976-12-23 |
|---|---|
| Beehive | 0416 |
| Dome | 1200-2359 |
| Old Faithful | 1028 long, 1132 long, 1250 long, 1355 long, 1514 short, 1606 long |
| Sawmill | 0920 |
| Values for Old Faithful Area | 1976-12-23 |
|---|---|
| Astronomical Twilight Begin | 06:12 |
| Nautical Twilight Begin | 06:47 |
| Civil Twilight Begin | 07:24 |
| Sunrise | 07:57 |
| Sunset | 16:47 |
| Civil Twilight End | 17:21 |
| Nautical Twilight End | 17:57 |
| Astronomical Twilight End | 18:33 |
| Moon Illumination | 6.61% |