| Geyser | 1974-08-13 |
|---|---|
| Bear Den | 0908 |
| Constant | 1132, 1546 |
| Echinus | 0831, 1000, 1142, 1312, 1426, 1446, 1604, 1731 |
| Ledge | 1103 |
| Valentine | 0944 |
| Whirligig | 1050, 1430, 1545 |
| Values for Old Faithful Area | 1974-08-13 |
|---|---|
| Astronomical Twilight Begin | 04:29 |
| Nautical Twilight Begin | 05:12 |
| Civil Twilight Begin | 05:52 |
| Sunrise | 06:23 |
| Sunset | 20:32 |
| Civil Twilight End | 21:04 |
| Nautical Twilight End | 21:43 |
| Astronomical Twilight End | 22:26 |
| Moon Illumination | 27.38% |