Possible North Korea Nuclear Test

Where: The Punggye-ri Nuclear Test Facility, North Korea’s only nuclear test site, located in mountainous terrain in the northeast of the country; has three visible tunnel entrances known as the South Portal, East Portal, and West Portal.

Previous tests: 2006, 2009 and 2013; all at Punggye-ri

Alert: Suspicions of a possible nuclear test were first raised by seismologists who detected a 5.1 magnitude tremor near Punggye-ri. The U.S. Geological Survey said the epicenter of the quake, detected at 10 a.m. Pyongyang time (0130 GMT), was about 50 kilometers (30 miles) northwest of Kilju city, placing it next to the Punggye-ri nuclear test site.

No confirmation: The White House said it could not confirm the North Korean test.

Sources: The Nuclear Threat Initiative, AFP