| Geyser | 1974-08-11 |
|---|---|
| Bear Den | 1800 |
| Constant | 1349, 1717 |
| Echinus | 1050, 1213, 1336, 1505, 1632 |
| Ledge | 1737 |
| Little Whirligig | 1423 |
| Valentine | 1310 A |
| Whirligig | 1343 |
| Values for Old Faithful Area | 1974-08-11 |
|---|---|
| Astronomical Twilight Begin | 04:25 |
| Nautical Twilight Begin | 05:09 |
| Civil Twilight Begin | 05:49 |
| Sunrise | 06:21 |
| Sunset | 20:35 |
| Civil Twilight End | 21:07 |
| Nautical Twilight End | 21:47 |
| Astronomical Twilight End | 22:31 |
| Moon Illumination | 48.64% |