| Geyser | 1978-07-13 |
|---|---|
| Constant | 0943 |
| Echinus | 0856, 1338, 1555, 2040 |
| Emerald Spring | 1200 |
| Guardian | 0947 |
| Veteran | 1615 |
| Whirligig | 0944, 1305 |
| Values for Old Faithful Area | 1978-07-13 |
|---|---|
| Astronomical Twilight Begin | 03:32 |
| Nautical Twilight Begin | 04:29 |
| Civil Twilight Begin | 05:15 |
| Sunrise | 05:50 |
| Sunset | 21:06 |
| Civil Twilight End | 21:42 |
| Nautical Twilight End | 22:28 |
| Astronomical Twilight End | 23:25 |
| Moon Illumination | 48.01% |