| Geyser | 1974-05-30 |
|---|---|
| Bear Den | 1747 |
| Echinus | 1011, 1625 |
| Harding | 2155 |
| Ledge | 1747 |
| Valentine | 1630 |
| Veteran | 1032 |
| Values for Old Faithful Area | 1974-05-30 |
|---|---|
| Astronomical Twilight Begin | 03:24 |
| Nautical Twilight Begin | 04:21 |
| Civil Twilight Begin | 05:07 |
| Sunrise | 05:42 |
| Sunset | 20:58 |
| Civil Twilight End | 21:34 |
| Nautical Twilight End | 22:20 |
| Astronomical Twilight End | 23:17 |
| Moon Illumination | 68.64% |