| Geyser | 1978-08-18 |
|---|---|
| Bear Den | 2200 ie |
| Echinus | 0937, 1102, 1231, 1356, 1521, 2335 |
| Little Whirligig | 1615 ie |
| Veteran | 1545 |
| Values for Old Faithful Area | 1978-08-18 |
|---|---|
| Astronomical Twilight Begin | 04:38 |
| Nautical Twilight Begin | 05:20 |
| Civil Twilight Begin | 05:58 |
| Sunrise | 06:29 |
| Sunset | 20:24 |
| Civil Twilight End | 20:55 |
| Nautical Twilight End | 21:34 |
| Astronomical Twilight End | 22:15 |
| Moon Illumination | 99.95% |