An earthquake with a magnitude of 3.5 jolted North Korea on Saturday, the U.S. Geological Survey said, briefly prompting speculation that it could have been caused by an artificial explosion.The quake was detected at 4:29 p.m. at a depth of 5 kilometers, the U.S. agency said, countering an earlier report by the China Earthquake Network Center that the temblor was detected at a depth of "0 kilometer."South Korea's weather agency also said its initial assessment was that the quake occurred naturally."The wave form was that seen in the event of a natural earthquake, and sound waves peculiar to…READ FULL ARTICLE
