| Geyser | 1974-06-28 |
|---|---|
| Bear Den | 0900 |
| Constant | 0924, 1257, 1308, 1625, 1645 |
| Echinus | 0925, 1205, 1500, 1624 |
| Ledge | 1302 |
| Little Whirligig | 1148, 1322 |
| Valentine | 1120 |
| Veteran | 1520 |
| Whirligig | 1111, 1253 |
| Values for Old Faithful Area | 1974-06-28 |
|---|---|
| Astronomical Twilight Begin | 03:13 |
| Nautical Twilight Begin | 04:15 |
| Civil Twilight Begin | 05:04 |
| Sunrise | 05:40 |
| Sunset | 21:12 |
| Civil Twilight End | 21:48 |
| Nautical Twilight End | 22:37 |
| Astronomical Twilight End | 23:39 |
| Moon Illumination | 65.35% |