| Geyser | 1971-02-14 |
|---|---|
| Castle | 1610 |
| Grand | 1650 |
| Old Faithful | 0950 ?, 1058 long, 1205 short, 1250 long |
| Riverside | 1031, 1638 |
| Vent | 0930 |
| Values for Old Faithful Area | 1971-02-14 |
|---|---|
| Astronomical Twilight Begin | 05:47 |
| Nautical Twilight Begin | 06:21 |
| Civil Twilight Begin | 06:55 |
| Sunrise | 07:25 |
| Sunset | 17:50 |
| Civil Twilight End | 18:19 |
| Nautical Twilight End | 18:54 |
| Astronomical Twilight End | 19:27 |
| Moon Illumination | 86.43% |