North Korea's official Korean Central News Agency announced Monday that it had conducted its first nuclear test, a claim verified by monitoring authorities in China and South Korea. The South Korean government informed U.S. officials that the explosion, registering 3.58 on the Richter scale, had taken place at 10:36 a.m. local time. The U.S. Geological Survey detected a "seismic event" of magnitude 4.2 at 10:35 a.m. local time 240 miles northeast of Pyongyang, the North Korean capital.
For more information on North Korea, visit the U.S. State Department's North Korea page.
Check out items on North Korea available through Chinook, the library's catalog.
For more information on nuclear energy, visit the OECD's Nuclear Energy Agency and International Atomic Energy Agency (IAEA).