| Geyser | 1971-06-18 |
|---|---|
| Beehive | 0911 |
| Castle | 0712 |
| Great Fountain | 0845 |
| Lion | 1120, 1300, 1600 |
| Old Faithful | 0835 short, 0933 long, 1057 short, 1145 long, 1302 short, 1401 short, 1521 short, 1600 long |
| Values for Old Faithful Area | 1971-06-18 |
|---|---|
| Astronomical Twilight Begin | 03:09 |
| Nautical Twilight Begin | 04:12 |
| Civil Twilight Begin | 05:01 |
| Sunrise | 05:37 |
| Sunset | 21:10 |
| Civil Twilight End | 21:47 |
| Nautical Twilight End | 22:35 |
| Astronomical Twilight End | 23:39 |
| Moon Illumination | 25.76% |