| Geyser | 1964-08-31 |
|---|---|
| Bear Den | 1540 |
| Ebony | 1540 maj |
| Echinus | 0728, 0834, 0936, 1034, 1138, 1236, 1340, 1440, 1548 |
| Steamboat | 0725 |
| Valentine | 0740, 0940 |
| Values for Old Faithful Area | 1964-08-31 |
|---|---|
| Astronomical Twilight Begin | 04:00 |
| Nautical Twilight Begin | 04:39 |
| Civil Twilight Begin | 05:15 |
| Sunrise | 05:45 |
| Sunset | 19:01 |
| Civil Twilight End | 19:31 |
| Nautical Twilight End | 20:07 |
| Astronomical Twilight End | 20:46 |
| Moon Illumination | 39.8% |