GeologyRocks

Earth tremors from Comoros' volcano Mount Karthala grew stronger and more frequent, residents said on Sunday, forcing thousands of nervous families to sleep outside overnight for fear their homes might collapse.

The Indian Ocean archipelago's largest island, Grand Comore, was put on red alert after Mount Karthala - one of the world's largest active volcanos - began to glow red and emit suffocating fumes late on Friday.