Journal
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
Volume 167, Issue 1-2, Pages 34-38Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.pepi.2008.02.004
Keywords
seismic array; nuclear explosion; relocation
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The location of the 2006 nuclear explosion in North Korea has been accurately imaged by back-projected regional Pn waves recorded by the Japanese Hi-net array. Based on the determined location, the nuclear explosion site can be identified from geo-referenced FORMOSAT-2 satellite images. The seismically determined epicenter is about 2.5 km northeast of the original estimate of its absolute location. Results indicate that a remote suspect event had been unambiguously detected and accurately located by a dense array within a regional distance. Employing ground truth correction, the satellite images can be referenced for shifting the array-determined epicenter to its absolute position. After correction, this event can be treated as a reference event for accurately locating future nuclear explosions. Our study utilizes public information from a dense seismic network and further demonstrates that commercial observation satellites can accurately monitor compliance with the Comprehensive Nuclear-Test-Ban Treaty, as well as earthquake and tsunami hazards almost in real time. (C) 2008 Elsevier B.V. All rights reserved.
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