Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Powerful Quake Off Chilean Coast Prompts Tsunami Warnings by VOA News A powerful earthquake struck southern Chile on Sunday, prompting authorities to issue a tsunami warning. There were no immediate reports of damage or injuries. The U.S. Geological Survey said the temblor had a magnitude of 7.7 and was centered 40 kilometers southwest of Puerto Quellon on Chile's sparsely populated southern coast. It struck at 11:22 am local time (1422 UTC). U.S. and Chilean authorities issued tsunami warnings for areas within 1,000 kilometers of the epicenter. It was the third earthquake this month of 7.7 magnitude or higher along the quake-prone Pacific Rim, sometimes referred to as the "ring of fire." A 7.8 magnitude-earthquake was recorded off the coast of the Solomon Islands on Dec. 8, and a 7.9-magnitude temblor was reported Dec. 17 in Papua New Guinea.