| Geyser | 1975-01-25 |
|---|---|
| Fountain | 0000-2359 |
| Grand | 1026 ie |
| Lion | 1023 ie, 1404 ie |
| Oblong | 1150 ie |
| Old Faithful | 0921 long, 1029 short, 1114 long, 1227 long, 1334 short, 1437 long, 1550 long |
| Riverside | 1032 |
| Values for Old Faithful Area | 1975-01-25 |
|---|---|
| Astronomical Twilight Begin | 06:07 |
| Nautical Twilight Begin | 06:42 |
| Civil Twilight Begin | 07:17 |
| Sunrise | 07:49 |
| Sunset | 17:22 |
| Civil Twilight End | 17:53 |
| Nautical Twilight End | 18:28 |
| Astronomical Twilight End | 19:03 |
| Moon Illumination | 92.24% |