| Geyser | 1974-07-30 |
|---|---|
| Constant | 1026, 1445, 1618 |
| Echinus | 0902, 1029, 1157, 1305, 1429, 1550 |
| Ledge | 1551 |
| Little Whirligig | 0946, 0948, 1800, 1952 |
| Valentine | 0830, 1528 |
| Whirligig | 0858, 0935, 1001, 1038, 1113, 1506, 1547, 1800 |
| Values for Old Faithful Area | 1974-07-30 |
|---|---|
| Astronomical Twilight Begin | 04:03 |
| Nautical Twilight Begin | 04:52 |
| Civil Twilight Begin | 05:34 |
| Sunrise | 06:07 |
| Sunset | 20:51 |
| Civil Twilight End | 21:24 |
| Nautical Twilight End | 22:07 |
| Astronomical Twilight End | 22:56 |
| Moon Illumination | 86.65% |