| Geyser | 1971-05-07 |
|---|---|
| Beehive | 1415 |
| Grand | 1610 |
| Old Faithful | 1151 long, 1306 short, 1349 long |
| Values for Old Faithful Area | 1971-05-07 |
|---|---|
| Astronomical Twilight Begin | 04:06 |
| Nautical Twilight Begin | 04:52 |
| Civil Twilight Begin | 05:33 |
| Sunrise | 06:05 |
| Sunset | 20:33 |
| Civil Twilight End | 21:06 |
| Nautical Twilight End | 21:47 |
| Astronomical Twilight End | 22:33 |
| Moon Illumination | 90.37% |