| Geyser | 1964-08-17 |
|---|---|
| Echinus | 0718, 0840, 0950, 1059, 1203, 1305, 1414, 1519, 1626 |
| Steamboat | 0810 |
| Valentine | 0825 |
| Values for Old Faithful Area | 1964-08-17 |
|---|---|
| Astronomical Twilight Begin | 03:37 |
| Nautical Twilight Begin | 04:19 |
| Civil Twilight Begin | 04:57 |
| Sunrise | 05:28 |
| Sunset | 19:25 |
| Civil Twilight End | 19:56 |
| Nautical Twilight End | 20:35 |
| Astronomical Twilight End | 21:17 |
| Moon Illumination | 69.84% |