| Geyser | 1971-10-07 |
|---|---|
| Beehive | 0934 |
| Castle | 1514 |
| Grand | 1547 |
| Old Faithful | 0812 long, 0923 short, 1022 long, 1136 short, 1341 short, 1424 long, 1536 short, 1623 long |
| Values for Old Faithful Area | 1971-10-07 |
|---|---|
| Astronomical Twilight Begin | 05:51 |
| Nautical Twilight Begin | 06:25 |
| Civil Twilight Begin | 06:59 |
| Sunrise | 07:28 |
| Sunset | 18:54 |
| Civil Twilight End | 19:23 |
| Nautical Twilight End | 19:57 |
| Astronomical Twilight End | 20:30 |
| Moon Illumination | 88.99% |