| Geyser | 1979-06-18 |
|---|---|
| Echinus | 0846, 1009, 1525, 1703, 1842, 2025 |
| Steamboat | 1526 |
| Veteran | 1530 |
| Whirligig | 0935 |
| Values for Old Faithful Area | 1979-06-18 |
|---|---|
| Astronomical Twilight Begin | 03:09 |
| Nautical Twilight Begin | 04:12 |
| Civil Twilight Begin | 05:01 |
| Sunrise | 05:38 |
| Sunset | 21:10 |
| Civil Twilight End | 21:47 |
| Nautical Twilight End | 22:35 |
| Astronomical Twilight End | 23:39 |
| Moon Illumination | 38.37% |