| Geyser | 1971-10-15 |
|---|---|
| Castle | 1126 ie |
| Depression | 1030 |
| Grand | 1320 ie |
| North Goggle | 1315 |
| Old Faithful | 0849 short, 0938 long, 1049 short, 1140 long, 1355 long, 1503 long, 1614 short, 1657 |
| Round | 0838 ? |
| Values for Old Faithful Area | 1971-10-15 |
|---|---|
| Astronomical Twilight Begin | 06:01 |
| Nautical Twilight Begin | 06:35 |
| Civil Twilight Begin | 07:08 |
| Sunrise | 07:38 |
| Sunset | 18:40 |
| Civil Twilight End | 19:09 |
| Nautical Twilight End | 19:43 |
| Astronomical Twilight End | 20:16 |
| Moon Illumination | 14.31% |