| Geyser | 1971-10-04 |
|---|---|
| Beehive | 1508 |
| Castle | 1635 ie |
| Echinus | 1641 |
| Grand | 0447 |
| Lion | 1315 |
| Little Cub | 1131 |
| North Goggle | 1637 |
| Old Faithful | 0953 long, 1109 long, 1315 long, 1433 long, 1539 long, 1649 long |
| Vixen | 1630 ie maj |
| Values for Old Faithful Area | 1971-10-04 |
|---|---|
| Astronomical Twilight Begin | 05:47 |
| Nautical Twilight Begin | 06:21 |
| Civil Twilight Begin | 06:55 |
| Sunrise | 07:24 |
| Sunset | 18:59 |
| Civil Twilight End | 19:28 |
| Nautical Twilight End | 20:02 |
| Astronomical Twilight End | 20:36 |
| Moon Illumination | 99.9% |