| Geyser | 1975-01-09 |
|---|---|
| Castle | 1410 |
| Daisy | 1026 |
| Grand | 1006 |
| Lone Star | 1338 ie |
| Old Faithful | 1126 long, 1238 long, 1352 long, 1504 long, 1617 long, 1728 |
| Riverside | 1000 ie |
| Values for Old Faithful Area | 1975-01-09 |
|---|---|
| Astronomical Twilight Begin | 06:14 |
| Nautical Twilight Begin | 06:49 |
| Civil Twilight Begin | 07:26 |
| Sunrise | 07:58 |
| Sunset | 17:02 |
| Civil Twilight End | 17:34 |
| Nautical Twilight End | 18:11 |
| Astronomical Twilight End | 18:46 |
| Moon Illumination | 9.32% |