| Geyser | 1974-07-17 |
|---|---|
| Bear Den | 1510 |
| Congress Pool | 1800 |
| Constant | 0956, 1103 |
| Echinus | 0933, 1103, 1235, 1403, 1542, 1712 |
| Ledge | 1434 |
| Little Whirligig | 0953 |
| Valentine | 1205 |
| Values for Old Faithful Area | 1974-07-17 |
|---|---|
| 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 | 7.44% |