| Geyser | 1976-12-29 |
|---|---|
| Aurum | 0315 |
| Beehive | 1058 |
| Castle | 1127 ie, 2051 ie |
| Dome | 1221 ie |
| Grand | 0245 |
| Old Faithful | 0935 short, 1034 long, 1156 long, 1304 long, 1413 long, 1531 long, 1642 long |
| Riverside | 1207 ie |
| Values for Old Faithful Area | 1976-12-29 |
|---|---|
| Astronomical Twilight Begin | 06:14 |
| Nautical Twilight Begin | 06:49 |
| Civil Twilight Begin | 07:26 |
| Sunrise | 07:59 |
| Sunset | 16:51 |
| Civil Twilight End | 17:25 |
| Nautical Twilight End | 18:01 |
| Astronomical Twilight End | 18:37 |
| Moon Illumination | 59.06% |