| Geyser | 1977-07-18 |
|---|---|
| Dabble | 0851 |
| Echinus | 0902 A, 1217 |
| Little Whirligig | 0815 ie, 1005 |
| Mud Spring | 1200 |
| Valentine | 0829 |
| Vixen | 1200 |
| Yellow Funnel Spring | 1200 |
| Values for Old Faithful Area | 1977-07-18 |
|---|---|
| Astronomical Twilight Begin | 03:41 |
| Nautical Twilight Begin | 04:35 |
| Civil Twilight Begin | 05:20 |
| Sunrise | 05:55 |
| Sunset | 21:03 |
| Civil Twilight End | 21:38 |
| Nautical Twilight End | 22:23 |
| Astronomical Twilight End | 23:17 |
| Moon Illumination | 3.55% |