| Geyser | 1970-05-19 |
|---|---|
| Castle | 0832 |
| Great Fountain | 1200 |
| Old Faithful | 0812 long, 0921 short, 1006 long, 1123 short, 1338 short, 1439 short, 1549 long, 1649 short, 1815 short |
| Riverside | 0857, 2115 |
| Values for Old Faithful Area | 1970-05-19 |
|---|---|
| Astronomical Twilight Begin | 03:41 |
| Nautical Twilight Begin | 04:33 |
| Civil Twilight Begin | 05:17 |
| Sunrise | 05:51 |
| Sunset | 20:47 |
| Civil Twilight End | 21:22 |
| Nautical Twilight End | 22:05 |
| Astronomical Twilight End | 22:57 |
| Moon Illumination | 95.7% |