| Geyser | 1966-07-29 |
|---|---|
| Blue | 1950 A |
| Cistern Spring | 1800 |
| Echinus | 0800, 0901, 1000, 1100, 1159, 1359, 1459, 1559 |
| Ledge | 0930 |
| Scummy Pool | 1800 |
| Steamboat | 1800 |
| Values for Old Faithful Area | 1966-07-29 |
|---|---|
| Astronomical Twilight Begin | 04:01 |
| Nautical Twilight Begin | 04:50 |
| Civil Twilight Begin | 05:33 |
| Sunrise | 06:06 |
| Sunset | 20:52 |
| Civil Twilight End | 21:26 |
| Nautical Twilight End | 22:08 |
| Astronomical Twilight End | 22:58 |
| Moon Illumination | 90.62% |