| Geyser | 1964-07-18 |
|---|---|
| Echinus | 0900, 1021, 1143, 1304, 1600, 1724 |
| Pinwheel | 1044, 1136, 1201, 1423 |
| Values for Old Faithful Area | 1964-07-18 |
|---|---|
| Astronomical Twilight Begin | 02:41 |
| Nautical Twilight Begin | 03:35 |
| Civil Twilight Begin | 04:20 |
| Sunrise | 04:55 |
| Sunset | 20:03 |
| Civil Twilight End | 20:38 |
| Nautical Twilight End | 21:23 |
| Astronomical Twilight End | 22:17 |
| Moon Illumination | 67.13% |