| Geyser | 1969-08-04 |
|---|---|
| Cistern Spring | 1200 |
| Echinus | 0906, 0945, 1040, 1344, 1427, 1551 |
| Fearless | 1200 |
| Values for Old Faithful Area | 1969-08-04 |
|---|---|
| Astronomical Twilight Begin | 04:13 |
| Nautical Twilight Begin | 04:59 |
| Civil Twilight Begin | 05:40 |
| Sunrise | 06:13 |
| Sunset | 20:45 |
| Civil Twilight End | 21:17 |
| Nautical Twilight End | 21:58 |
| Astronomical Twilight End | 22:45 |
| Moon Illumination | 58.28% |