| Geyser | 1964-09-27 |
|---|---|
| Colloidal Pool | 1800 |
| Echinus | 0819-1748, 0819, 0922, 1025, 1129, 1234, 1339, 1443, 1748 |
| Emerald Spring | 1800 |
| Hurricane Vent | 1800 |
| Pinto | 1800 |
| Steamboat | 1800 |
| Values for Old Faithful Area | 1964-09-27 |
|---|---|
| Astronomical Twilight Begin | 04:39 |
| Nautical Twilight Begin | 05:14 |
| Civil Twilight Begin | 05:47 |
| Sunrise | 06:16 |
| Sunset | 18:11 |
| Civil Twilight End | 18:40 |
| Nautical Twilight End | 19:14 |
| Astronomical Twilight End | 19:48 |
| Moon Illumination | 65.14% |