Abstract
Earthquake, explosion, and a nuclear test data are compared with forward modeling and band-pass filtered surface wave amplitude data for exploring methodologies to improve earthquake-explosion discrimination. The proposed discrimination method is based on the solutions of a double integral transformation in the wavenumber and frequency domains. Recorded explosion data on June 26, 2001 (39.212°N, 125.383°E) and October 30, 2001 (38.748°N, 125.267°E), a nuclear test on October 9, 2006 (41.275°N, 129.095°E), and two earthquakes on April 14, 2002 (39.207°N, 125.686°E) and June 7, 2002 (38.703°N, 125.638°E), all in North Korea, are used to discriminate between explosions and earthquakes by seismic wave analysis and numerical modeling. The explosion signal is characterized by first P waves with higher energy than that of S waves. Rg waves are clearly dominant at 0.05–0.5 Hz in the explosion data but not in the earthquake data. This feature is attributed to the dominant P waves in the explosion and their coupling with the SH components.
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Cho, Kwang-Hyun obtained his M.S. (2001) and Ph.D. in Seismology from Seoul National University (2006). After one year postdoctoral research at KIGAM, Korea Institute of Geoscience and Mineral Resources, he joined the Korea National Oil Corporation (KNOC) in 2006. His research interests are applied earthquake seismology, seismic numerical modeling, seismic wave propagation, and surface wave tomography including ANT (Ambient Noise Tomography).
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Cho, KH. Discriminating between explosions and earthquakes. Appl. Geophys. 11, 429–436 (2014). https://doi.org/10.1007/s11770-014-0450-4
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DOI: https://doi.org/10.1007/s11770-014-0450-4