| Geyser | 1969-07-17 |
|---|---|
| Echinus | 0830, 0930, 1010, 1102, 1145, 1230, 1330, 1455, 1547, 1635, 1725 |
| Values for Old Faithful Area | 1969-07-17 |
|---|---|
| Astronomical Twilight Begin | 03:39 |
| Nautical Twilight Begin | 04:34 |
| Civil Twilight Begin | 05:19 |
| Sunrise | 05:54 |
| Sunset | 21:04 |
| Civil Twilight End | 21:39 |
| Nautical Twilight End | 22:24 |
| Astronomical Twilight End | 23:19 |
| Moon Illumination | 6.32% |