| Geyser | 1976-10-31 |
|---|---|
| Beehive | 1305 |
| Castle | 0929 maj |
| Grand | 1045 ie |
| Old Faithful | 0911 long, 1016 long, 1135 long, 1240 short, 1355 long, 1504 long, 1615 long, 1729 long |
| Riverside | 1226 |
| Values for Old Faithful Area | 1976-10-31 |
|---|---|
| Astronomical Twilight Begin | 05:21 |
| Nautical Twilight Begin | 05:55 |
| Civil Twilight Begin | 06:29 |
| Sunrise | 06:59 |
| Sunset | 17:13 |
| Civil Twilight End | 17:44 |
| Nautical Twilight End | 18:18 |
| Astronomical Twilight End | 18:52 |
| Moon Illumination | 63.49% |