| Geyser | 1974-07-20 |
|---|---|
| Bear Den | 1800 |
| Ebony | 0900 |
| Echinus | 0915, 1040, 1203, 1325, 1454, 1618, 1741 |
| Ledge | 0830, 2140 |
| Little Whirligig | 1406 |
| Vixen | 1400 |
| Whirligig | 1348 |
| Values for Old Faithful Area | 1974-07-20 |
|---|---|
| Astronomical Twilight Begin | 03:44 |
| Nautical Twilight Begin | 04:38 |
| Civil Twilight Begin | 05:22 |
| Sunrise | 05:57 |
| Sunset | 21:01 |
| Civil Twilight End | 21:36 |
| Nautical Twilight End | 22:21 |
| Astronomical Twilight End | 23:14 |
| Moon Illumination | 0.89% |