| Geyser | 1974-06-23 |
|---|---|
| Bear Den | 1115 |
| Constant | 0919, 1019, 1120, 1233, 1325, 1453, 1547, 1628, 1716 |
| Echinus | 0900, 1025, 1150, 1443, 1554, 1721 |
| Harding | 0900 |
| Ledge | 0630 A, 2004 |
| Little Whirligig | 0942, 1151, 1335, 1537, 1723 |
| Valentine | 0930 ? |
| Whirligig | 0903, 1118, 1302, 1459, 1644 |
| Values for Old Faithful Area | 1974-06-23 |
|---|---|
| Astronomical Twilight Begin | 03:10 |
| Nautical Twilight Begin | 04:13 |
| Civil Twilight Begin | 05:02 |
| Sunrise | 05:39 |
| Sunset | 21:11 |
| Civil Twilight End | 21:48 |
| Nautical Twilight End | 22:37 |
| Astronomical Twilight End | 23:40 |
| Moon Illumination | 13.33% |