| Geyser | 1966-08-26 |
|---|---|
| Blue | 0930 ie |
| Cistern Spring | 0800 |
| Ebony | 1047 |
| Echinus | 0805, 0907, 1009, 1111, 1213, 1316, 1416, 1516, 1623 |
| Harding | 0800 |
| Ledge | 1243 |
| Morning | 0710 |
| Steamboat | 0800 |
| Valentine | 1053 |
| Values for Old Faithful Area | 1966-08-26 |
|---|---|
| Astronomical Twilight Begin | 04:51 |
| Nautical Twilight Begin | 05:31 |
| Civil Twilight Begin | 06:08 |
| Sunrise | 06:38 |
| Sunset | 20:11 |
| Civil Twilight End | 20:41 |
| Nautical Twilight End | 21:18 |
| Astronomical Twilight End | 21:58 |
| Moon Illumination | 80.11% |