| Geyser | 1971-06-01 |
|---|---|
| Castle | 0900 |
| Depression | 0805 |
| Grand | 0757, 1750 |
| Old Faithful | 0902 short, 0950 long, 1109 short, 1203 short, 1315 short, 1400 short, 1514 short, 1615 long, 1725 short |
| Riverside | 0805 |
| Values for Old Faithful Area | 1971-06-01 |
|---|---|
| Astronomical Twilight Begin | 03:21 |
| Nautical Twilight Begin | 04:19 |
| Civil Twilight Begin | 05:06 |
| Sunrise | 05:41 |
| Sunset | 21:00 |
| Civil Twilight End | 21:35 |
| Nautical Twilight End | 22:22 |
| Astronomical Twilight End | 23:20 |
| Moon Illumination | 52.11% |