| Geyser | 1975-02-09 |
|---|---|
| Dome | 0000-2359 |
| Old Faithful | 0927 long, 1032 long, 1130 long, 1247 short, 1339 long, 1458 long, 1602 long, 1804 long |
| Vault | 0000-2359 |
| Values for Old Faithful Area | 1975-02-09 |
|---|---|
| Astronomical Twilight Begin | 05:53 |
| Nautical Twilight Begin | 06:27 |
| Civil Twilight Begin | 07:01 |
| Sunrise | 07:32 |
| Sunset | 17:43 |
| Civil Twilight End | 18:13 |
| Nautical Twilight End | 18:47 |
| Astronomical Twilight End | 19:21 |
| Moon Illumination | 3.32% |