A 2.4 magnitude earthquake struck near a North Korean nuclear test site Thursday, South Korea's state weather agency said, noting it appeared to have occurred naturally. The earthquake was detected about 41 kilometers northwest of Kilju, North Hamgyong Province, at 7 p.m., with its epicenter at a latitude of 41.30 degrees north and a longitude of 129.16 degrees east at a depth of 20 km, according to the Korea Meteorological Administration. Kilju is home to the Punggye-ri nuclear test site, where North Korea conducted all six of its nuclear tests. Source: Yonhap News Agency