| Geyser | 1966-07-23 |
|---|---|
| Ebony | 1130, 1557 |
| Echinus | 0750, 0902, 1015, 1128, 1240, 1353, 1507, 1620, 1733 |
| Ledge | 0912 min, 1805 maj |
| Steamboat | 1800 |
| Sunday | 1800 |
| Valentine | 1431 |
| Values for Old Faithful Area | 1966-07-23 |
|---|---|
| Astronomical Twilight Begin | 03:49 |
| Nautical Twilight Begin | 04:41 |
| Civil Twilight Begin | 05:25 |
| Sunrise | 06:00 |
| Sunset | 20:59 |
| Civil Twilight End | 21:33 |
| Nautical Twilight End | 22:17 |
| Astronomical Twilight End | 23:09 |
| Moon Illumination | 32.75% |