| Geyser | 1971-02-26 |
|---|---|
| Castle | 1020 |
| Grand | 1130 |
| Old Faithful | 1032 long, 1148 short, 1235, 1404 long, 1513 short |
| Other Geyser | 1650 |
| Sawmill | 0930 ie |
| Values for Old Faithful Area | 1971-02-26 |
|---|---|
| Astronomical Twilight Begin | 05:29 |
| Nautical Twilight Begin | 06:03 |
| Civil Twilight Begin | 06:36 |
| Sunrise | 07:06 |
| Sunset | 18:06 |
| Civil Twilight End | 18:35 |
| Nautical Twilight End | 19:09 |
| Astronomical Twilight End | 19:43 |
| Moon Illumination | 1.21% |