| Geyser | 1966-07-18 |
|---|---|
| Blue | 0830 |
| Cistern Spring | 0800 |
| Echinus | 0804, 0859, 0956, 1054, 1153, 1253, 1352, 1450, 1549 |
| Ledge | 1723 |
| Steamboat | 0800 |
| Valentine | 1215 |
| Values for Old Faithful Area | 1966-07-18 |
|---|---|
| Astronomical Twilight Begin | 03:40 |
| Nautical Twilight Begin | 04:35 |
| Civil Twilight Begin | 05:20 |
| Sunrise | 05:55 |
| Sunset | 21:03 |
| Civil Twilight End | 21:38 |
| Nautical Twilight End | 22:23 |
| Astronomical Twilight End | 23:18 |
| Moon Illumination | 0.01% |