| Geyser | 1982-07-27 |
|---|---|
| Constant | 1518:33, 1752 |
| Echinus | 1200 |
| Emerald Spring | 1200 |
| Porkchop | 1200 |
| Steamboat | 1200 |
| Veteran | 1200 |
| Whirligig | 1545:30, 1629:19, 1705:57, 1750:28 |
| Values for Old Faithful Area | 1982-07-27 |
|---|---|
| Astronomical Twilight Begin | 03:57 |
| Nautical Twilight Begin | 04:47 |
| Civil Twilight Begin | 05:30 |
| Sunrise | 06:04 |
| Sunset | 20:54 |
| Civil Twilight End | 21:28 |
| Nautical Twilight End | 22:11 |
| Astronomical Twilight End | 23:01 |
| Moon Illumination | 44.78% |