| Geyser | 1971-10-18 |
|---|---|
| Beehive | 1003 |
| Castle | 0345 ie |
| Old Faithful | 0818 long, 0927 short, 1051 long, 1255 long, 1401 long, 1518 short, 1602 long, 1715 short |
| Values for Old Faithful Area | 1971-10-18 |
|---|---|
| Astronomical Twilight Begin | 06:05 |
| Nautical Twilight Begin | 06:38 |
| Civil Twilight Begin | 07:12 |
| Sunrise | 07:41 |
| Sunset | 18:35 |
| Civil Twilight End | 19:04 |
| Nautical Twilight End | 19:38 |
| Astronomical Twilight End | 20:11 |
| Moon Illumination | 1.05% |