| Geyser | 1977-06-02 |
|---|---|
| Echinus | 0815, 0911, 1021, 1400 |
| Splutter Pot | 1800 |
| Values for Old Faithful Area | 1977-06-02 |
|---|---|
| Astronomical Twilight Begin | 03:19 |
| Nautical Twilight Begin | 04:18 |
| Civil Twilight Begin | 05:05 |
| Sunrise | 05:40 |
| Sunset | 21:01 |
| Civil Twilight End | 21:37 |
| Nautical Twilight End | 22:24 |
| Astronomical Twilight End | 23:22 |
| Moon Illumination | 99.74% |