South Korea's weather agency said a magnitude 3.2 earthquake was detected in North Korea on Saturday close to where the country recently conducted a nuclear test, but it assessed the quake as natural. "It could be a natural earthquake that really was man-made, as the nuclear test would have transferred a lot of stress," he said. China's official Xinhua News Agency said earlier that the country's seismic service detected a magnitude 3.4 quake in North Korea and saw the likely cause as an explosion. North Korea's weakest nuclear test, its first one, conducted in 2006, generated a magnitude 4.3 quake. North Korea said its recent nuclear test was a detonation of a thermonuclear weapon built for its developmental intercontinental ballistic missiles.

Source: Los Angeles Times September 23, 2017 10:22 UTC