| Geyser | 1974-12-30 |
|---|---|
| Castle | 1055, 2005 |
| Grand | 1156 ie, 2012 |
| Old Faithful | 0854 long, 1014 short, 1100 long, 1213 short, 1329 long, 1437 short, 1527 long, 1639 short |
| Riverside | 1305 |
| Values for Old Faithful Area | 1974-12-30 |
|---|---|
| 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 | 18:37 |
| Moon Illumination | 98.16% |