| Geyser | 1978-07-20 |
|---|---|
| Echinus | 0830, 1105, 1225, 1355, 1512 |
| Orby | 0855 |
| Splutter Pot | 1310 |
| Veteran | 0905 |
| Whirligig | 0815, 1030 |
| Values for Old Faithful Area | 1978-07-20 |
|---|---|
| Astronomical Twilight Begin | 03:44 |
| Nautical Twilight Begin | 04:38 |
| Civil Twilight Begin | 05:22 |
| Sunrise | 05:57 |
| Sunset | 21:01 |
| Civil Twilight End | 21:36 |
| Nautical Twilight End | 22:21 |
| Astronomical Twilight End | 23:14 |
| Moon Illumination | 99.98% |