| Geyser | 1974-08-19 |
|---|---|
| Bear Den | 1100 |
| Cistern Spring | 1200 |
| Constant | 1255 |
| Echinus | 0815, 0915, 1023, 1129, 1233, 1440, 1547, 1653 |
| Rubble | 1745 |
| Vixen | 0915, 0950 |
| Values for Old Faithful Area | 1974-08-19 |
|---|---|
| Astronomical Twilight Begin | 04:40 |
| Nautical Twilight Begin | 05:21 |
| Civil Twilight Begin | 05:59 |
| Sunrise | 06:30 |
| Sunset | 20:23 |
| Civil Twilight End | 20:54 |
| Nautical Twilight End | 21:32 |
| Astronomical Twilight End | 22:13 |
| Moon Illumination | 3.25% |