A perfect lunar halo was spotted in the sky of Pingtan county, Fujian province on March 31.
The unusually large and clear halo descended at around 8 pm, resembling a large colorful ring.
This phenomenon is caused by moonlight refracted from ice crystals in the upper atmosphere. The shape of the ice crystals focuses the light into a ring, said Deng Yiqin, a local weatherman.
Keen-sighted observers could make out the colors of the rainbow inside the ring. Usually, lunar halos are soft white and lack vivid colors.
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A lunar halo appears over Pingtan, Fujian province, March 31. [Photo/ptnet.cn] |
