| Geyser | 1964-07-20 |
|---|---|
| Blue | 1755 |
| Echinus | 0742, 0855, 1003, 1114, 1223, 1327, 1434, 1553, 1711 |
| Guardian | 0715 |
| Steamboat | 0725 |
| Values for Old Faithful Area | 1964-07-20 |
|---|---|
| Astronomical Twilight Begin | 02:45 |
| Nautical Twilight Begin | 03:38 |
| Civil Twilight Begin | 04:23 |
| Sunrise | 04:57 |
| Sunset | 20:01 |
| Civil Twilight End | 20:36 |
| Nautical Twilight End | 21:20 |
| Astronomical Twilight End | 22:14 |
| Moon Illumination | 83.37% |