| Geyser | 1980-08-29 |
|---|---|
| Arsenic | 1951 |
| Bear Den | 1335, 1635, 1937 |
| Constant | 1525 |
| Echinus | 1027, 1345, 1426 |
| Whirligig | 1202, 1526 |
| Values for Old Faithful Area | 1980-08-29 |
|---|---|
| Astronomical Twilight Begin | 04:57 |
| Nautical Twilight Begin | 05:36 |
| Civil Twilight Begin | 06:12 |
| Sunrise | 06:43 |
| Sunset | 20:05 |
| Civil Twilight End | 20:35 |
| Nautical Twilight End | 21:11 |
| Astronomical Twilight End | 21:50 |
| Moon Illumination | 86.43% |