Colourful Glowing Clouds

Bizarre colorful (luminous/glowing) cloud phenomenon in the sky was observed about 30 mins before the May 12, 2008 Sichuan earthquake took place in Tianshui, Gansu province ~450km northeast of epicenter.

Similar cloud formation captured 20 minutes later in a different city, Meixian, Shaanxi province ~ 550km northeast of epicenter. The phenomenon was said to last for about 1 minute
The clouds seemed to have characteristics resembling the Auroras..
http://www.youtube.com/watch?v=KKMTSDzU1Z4
Video recorded in Tianshui

http://www.youtube.com/watch?v=hzVamNQzfYA
Video recorded in Meixian