| Geyser | 1966-07-15 |
|---|---|
| Blue | 1540 ie, 1605 |
| Cistern Spring | 1800 |
| Echinus | 0906, 1028, 1141, 1257, 1412, 1525, 1640 |
| Ledge | 1400, 2230 ie |
| Scummy Pool | 1800 |
| Steamboat | 0800 |
| Values for Old Faithful Area | 1966-07-15 |
|---|---|
| Astronomical Twilight Begin | 03:35 |
| Nautical Twilight Begin | 04:31 |
| Civil Twilight Begin | 05:17 |
| Sunrise | 05:52 |
| Sunset | 21:05 |
| Civil Twilight End | 21:41 |
| Nautical Twilight End | 22:26 |
| Astronomical Twilight End | 23:22 |
| Moon Illumination | 11.1% |