A rare solar halo emerged in Mianning County in southwest China's
Sichuan Province at noon on April 5. The
colorful halo surrounded the sun for more than one hour. A
meteorologist said that a solar halo is caused by the refraction of
sunlight. The appearance of a solar halo generally indicates that
the weather is about to change. However, a solar halo is quite
rare.
(People's Daily April 7, 2007)
