| Geyser | 1977-09-02 |
|---|---|
| Blue | 1200 |
| Echinus | 1027, 1429 |
| Little Whirligig | 1112 |
| Pinwheel | 1200 |
| Whirligig | 1600 |
| Values for Old Faithful Area | 1977-09-02 |
|---|---|
| Astronomical Twilight Begin | 05:03 |
| Nautical Twilight Begin | 05:41 |
| Civil Twilight Begin | 06:17 |
| Sunrise | 06:47 |
| Sunset | 19:58 |
| Civil Twilight End | 20:28 |
| Nautical Twilight End | 21:04 |
| Astronomical Twilight End | 21:41 |
| Moon Illumination | 80.04% |