| Geyser | 1964-07-12 |
|---|---|
| Arsenic | 1330 |
| Ebony | 1435 |
| Echinus | 0815, 0945, 1112, 1243, 1405, 1540, 1704 |
| Ledge | 0900 |
| Pinwheel | 1001, 1030, 1353, 1430 |
| Steamboat | 0720-1300 |
| Sunday | 1420 |
| Valentine | 0000 A |
| Values for Old Faithful Area | 1964-07-12 |
|---|---|
| Astronomical Twilight Begin | 02:31 |
| Nautical Twilight Begin | 03:28 |
| Civil Twilight Begin | 04:14 |
| Sunrise | 04:50 |
| Sunset | 20:07 |
| Civil Twilight End | 20:42 |
| Nautical Twilight End | 21:29 |
| Astronomical Twilight End | 22:26 |
| Moon Illumination | 10.96% |