Ralph von Frese

Articles by Ralph von Frese

18 August 2011

A new way to detect secret nuclear tests: GPS

Jihye ParkDorota A. Grejner-BrzezinskaRalph von Frese

When North Korea conducted its second known nuclear bomb test on May 25, 2009, the country's leaders took extreme care to conceal the details of the event. They detonated the bomb a kilometer or so beneath the earth, so no radiation could escape; radiation clues could have enabled member countries of the Comprehensive Nuclear Test Ban Treaty Organization to more accurately determine the type and size of the bomb tested.