A strange rainbow

Good morning and happy solstice everyone; no computer stuff today. On today’s fun-for-Friday FAIC, here’s a photo I snapped last weekend of the strangest set of rainbows (well, technically these are not “rainbows” because it was not raining, but, whatever) I have ever seen in my life.  (Click for a larger version.)


The photo was taken on the 15th of June at 7:30 PM Pacific Daylight Time in Seattle, so the solar altitude would have been about 14 degrees. The sun is just out of shot below the bottom of the frame. All day long there had been a 22 degree halo and most of the time it was a full circle. The 22 degree halo is pretty common; it’s a circular rainbow around the sun caused by hexagonal ice crystals in the upper atmosphere. And indeed there were a lot of high cirrus clouds that day. I see these fairly frequently because I look for them; most people don’t look towards the sun when looking for rainbows.
Continue reading