| Geyser | 1964-08-01 |
|---|---|
| Echinus | 0740 A, 0848, 0952, 1104, 1215, 1322, 1437, 1542, 1645 |
| Guardian | 0720 |
| Valentine | 1028 |
| Values for Old Faithful Area | 1964-08-01 |
|---|---|
| Astronomical Twilight Begin | 03:07 |
| Nautical Twilight Begin | 03:55 |
| Civil Twilight Begin | 04:37 |
| Sunrise | 05:10 |
| Sunset | 19:48 |
| Civil Twilight End | 20:21 |
| Nautical Twilight End | 21:03 |
| Astronomical Twilight End | 21:51 |
| Moon Illumination | 48.51% |