| Geyser | 1972-09-25 |
|---|---|
| Bear Den | 1800 |
| Castle | 1340 |
| Grand | 1430 |
| Old Faithful | 0830 long, 0939 short, 1033 long, 1148 short, 1231 long, 1346 short, 1444 long, 1612 short, 1653 long |
| Riverside | 1400 |
| Values for Old Faithful Area | 1972-09-25 |
|---|---|
| Astronomical Twilight Begin | 05:37 |
| Nautical Twilight Begin | 06:11 |
| Civil Twilight Begin | 06:45 |
| Sunrise | 07:14 |
| Sunset | 19:15 |
| Civil Twilight End | 19:44 |
| Nautical Twilight End | 20:17 |
| Astronomical Twilight End | 20:52 |
| Moon Illumination | 93.88% |