| Geyser | 1974-08-21 |
|---|---|
| Cistern Spring | 1200 |
| Constant | 0942 |
| Echinus | 0818, 0920, 1022, 1140, 1255, 1400, 1613 |
| Values for Old Faithful Area | 1974-08-21 |
|---|---|
| Astronomical Twilight Begin | 04:43 |
| Nautical Twilight Begin | 05:24 |
| Civil Twilight Begin | 06:02 |
| Sunrise | 06:33 |
| Sunset | 20:19 |
| Civil Twilight End | 20:50 |
| Nautical Twilight End | 21:28 |
| Astronomical Twilight End | 22:09 |
| Moon Illumination | 16.51% |