| Geyser | 1966-07-10 |
|---|---|
| Bear Den | 1800 |
| Blue | 2100 ie |
| Dark Cavern | 1620 |
| Ebony | 1702 min |
| Echinus | 0901, 1012, 1110, 1212, 1317, 1422, 1527, 1632 |
| Steamboat | 1800 |
| Values for Old Faithful Area | 1966-07-10 |
|---|---|
| Astronomical Twilight Begin | 03:27 |
| Nautical Twilight Begin | 04:25 |
| Civil Twilight Begin | 05:12 |
| Sunrise | 05:48 |
| Sunset | 21:08 |
| Civil Twilight End | 21:44 |
| Nautical Twilight End | 22:31 |
| Astronomical Twilight End | 23:29 |
| Moon Illumination | 56.35% |