| Geyser | 1975-01-16 |
|---|---|
| Castle | 1350 |
| Grand | 1521 |
| Old Faithful | 0859 short, 0944 long, 1102 short, 1149 long, 1308 long, 1413 short, 1526 short, 1610 long, 1726 short |
| Values for Old Faithful Area | 1975-01-16 |
|---|---|
| Astronomical Twilight Begin | 06:12 |
| Nautical Twilight Begin | 06:47 |
| Civil Twilight Begin | 07:23 |
| Sunrise | 07:55 |
| Sunset | 17:10 |
| Civil Twilight End | 17:42 |
| Nautical Twilight End | 18:18 |
| Astronomical Twilight End | 18:53 |
| Moon Illumination | 13.04% |