| Geyser | 1970-05-18 |
|---|---|
| Castle | 1530 |
| Grand | 1530 |
| Great Fountain | 1622 |
| Lion | 0945 |
| Old Faithful | 0756, 0905, 0958, 1109, 1324, 1430, 1542, 1631 |
| Riverside | 0908 |
| Rocket | 0914 |
| Values for Old Faithful Area | 1970-05-18 |
|---|---|
| Astronomical Twilight Begin | 03:43 |
| Nautical Twilight Begin | 04:34 |
| Civil Twilight Begin | 05:18 |
| Sunrise | 05:52 |
| Sunset | 20:46 |
| Civil Twilight End | 21:20 |
| Nautical Twilight End | 22:04 |
| Astronomical Twilight End | 22:55 |
| Moon Illumination | 90.46% |