| Geyser | 1964-07-01 |
|---|---|
| Bear Den | 0753 ? |
| Ebony | 0753 ? |
| Echinus | 0838, 0950 ?, 1100, 1325, 1430, 1540, 1652 |
| Ledge | 1445 |
| Steamboat | 0730 |
| Valentine | 1430 |
| Values for Old Faithful Area | 1964-07-01 |
|---|---|
| Astronomical Twilight Begin | 02:16 |
| Nautical Twilight Begin | 03:18 |
| Civil Twilight Begin | 04:06 |
| Sunrise | 04:42 |
| Sunset | 20:11 |
| Civil Twilight End | 20:48 |
| Nautical Twilight End | 21:36 |
| Astronomical Twilight End | 22:37 |
| Moon Illumination | 66.44% |