| Geyser | 1971-10-06 |
|---|---|
| Castle | 1100 |
| Grand | 1055 |
| Lion | 1027, 1429 |
| Old Faithful | 0836 short, 0921 long, 1034 short, 1146 long, 1304 short, 1402 long, 1518 short, 1601 long |
| Vault | 1105, 1436 |
| Values for Old Faithful Area | 1971-10-06 |
|---|---|
| Astronomical Twilight Begin | 05:50 |
| Nautical Twilight Begin | 06:24 |
| Civil Twilight Begin | 06:57 |
| Sunrise | 07:26 |
| Sunset | 18:56 |
| Civil Twilight End | 19:25 |
| Nautical Twilight End | 19:58 |
| Astronomical Twilight End | 20:32 |
| Moon Illumination | 95.37% |