Possible Explosion of Magnitude 5.3 in North Korea
USGS is providing up-to-date information.
Visit the USGS event page for more details.
North Korea has announced it successfully carried out a nuclear warhead explosion test on September 9. This seismic event has explosion-like characteristics and occurred where North Korea has detonated nuclear explosions in the past. If this is indeed an explosion, the USGS cannot determine what type of explosion it may be, whether nuclear or any other possible type. Please monitor the State Department website (www.state.gov) for official updates.
Learn more about the USGS Earthquake Hazards Program.