| Geyser | 1967-07-20 |
|---|---|
| Echinus | 0849, 0936, 1116, 1204, 1342, 1430, 1517, 1607, 1655 |
| Pearl | 0830 ie |
| Valentine | 0000 |
| Values for Old Faithful Area | 1967-07-20 |
|---|---|
| Astronomical Twilight Begin | 03:43 |
| Nautical Twilight Begin | 04:37 |
| Civil Twilight Begin | 05:22 |
| Sunrise | 05:57 |
| Sunset | 21:02 |
| Civil Twilight End | 21:36 |
| Nautical Twilight End | 22:21 |
| Astronomical Twilight End | 23:15 |
| Moon Illumination | 97.8% |