| Geyser | 1964-07-27 |
|---|---|
| Echinus | 0745, 0857, 1010, 1122, 1142, 1230, 1305, 1342, 1438, 1557, 1723 |
| Pinwheel | 0855, 1025, 1304, 1420, 1446, 1608, 1642, 1710 |
| Steamboat | 0747 |
| Values for Old Faithful Area | 1964-07-27 |
|---|---|
| Astronomical Twilight Begin | 02:58 |
| Nautical Twilight Begin | 03:48 |
| Civil Twilight Begin | 04:31 |
| Sunrise | 05:05 |
| Sunset | 19:54 |
| Civil Twilight End | 20:28 |
| Nautical Twilight End | 21:11 |
| Astronomical Twilight End | 22:01 |
| Moon Illumination | 93.19% |