| Geyser | 1966-07-22 |
|---|---|
| Blue | 1935 |
| Cistern Spring | 1800 |
| Ebony | 1034, 1935 |
| Echinus | 0914, 1021, 1131, 1244, 1355, 1505, 1617 |
| Ledge | 1935 |
| Steamboat | 1800 |
| Valentine | 1400 A |
| Values for Old Faithful Area | 1966-07-22 |
|---|---|
| Astronomical Twilight Begin | 03:47 |
| Nautical Twilight Begin | 04:40 |
| Civil Twilight Begin | 05:24 |
| Sunrise | 05:59 |
| Sunset | 21:00 |
| Civil Twilight End | 21:34 |
| Nautical Twilight End | 22:18 |
| Astronomical Twilight End | 23:11 |
| Moon Illumination | 22.32% |