| Geyser | 1971-10-30 |
|---|---|
| Beehive | 0342 |
| Depression | 1617 |
| Great Fountain | 1445 |
| Lion | 1628 |
| Old Faithful | 0906, 1026 short, 1114 long, 1322, 1630 short |
| Riverside | 1350 |
| Values for Old Faithful Area | 1971-10-30 |
|---|---|
| Astronomical Twilight Begin | 06:19 |
| Nautical Twilight Begin | 06:53 |
| Civil Twilight Begin | 07:27 |
| Sunrise | 07:57 |
| Sunset | 18:16 |
| Civil Twilight End | 18:46 |
| Nautical Twilight End | 19:20 |
| Astronomical Twilight End | 19:54 |
| Moon Illumination | 81.47% |