| Geyser | 1971-02-13 |
|---|---|
| Castle | 1443 |
| Old Faithful | 1040 long, 1142 short, 1228 long, 1348 short, 1449 long, 1559 short |
| Riverside | 1550 |
| Values for Old Faithful Area | 1971-02-13 |
|---|---|
| Astronomical Twilight Begin | 05:48 |
| Nautical Twilight Begin | 06:22 |
| Civil Twilight Begin | 06:56 |
| Sunrise | 07:26 |
| Sunset | 17:48 |
| Civil Twilight End | 18:18 |
| Nautical Twilight End | 18:52 |
| Astronomical Twilight End | 19:26 |
| Moon Illumination | 92.22% |