| Geyser | 1977-06-15 |
|---|---|
| Bear Den | 0940 |
| Constant | 1142 |
| Echinus | 0925 ie |
| Little Whirligig | 1140 |
| Splutter Pot | 1005 |
| Valentine | 0942 |
| Whirligig | 1005, 1053 |
| Values for Old Faithful Area | 1977-06-15 |
|---|---|
| Astronomical Twilight Begin | 03:09 |
| Nautical Twilight Begin | 04:12 |
| Civil Twilight Begin | 05:01 |
| Sunrise | 05:37 |
| Sunset | 21:09 |
| Civil Twilight End | 21:46 |
| Nautical Twilight End | 22:34 |
| Astronomical Twilight End | 23:37 |
| Moon Illumination | 2.07% |