| Geyser | 1964-07-23 |
|---|---|
| Blue | 1500 ie |
| Echinus | 0657, 0816, 0930, 1045, 1204, 1321, 1445, 1610 |
| Steamboat | 0405 |
| Valentine | 0510 |
| Values for Old Faithful Area | 1964-07-23 |
|---|---|
| Astronomical Twilight Begin | 02:50 |
| Nautical Twilight Begin | 03:42 |
| Civil Twilight Begin | 04:26 |
| Sunrise | 05:00 |
| Sunset | 19:58 |
| Civil Twilight End | 20:32 |
| Nautical Twilight End | 21:16 |
| Astronomical Twilight End | 22:08 |
| Moon Illumination | 98.23% |