Physics
Scientific paper
Nov 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3621304f&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 21, CiteID L21304
Physics
1
Seismology: Seismic Monitoring And Test-Ban Treaty Verification, Seismology: Earthquake Source Observations (1240), Seismology: Seismicity And Tectonics (1207, 1217, 1240, 1242)
Scientific paper
A series of source inversions are performed for the 25 May 2009 (Memorial Day) North Korean seismic event using intermediate period (10-50 s) complete waveform modeling. An earthquake source is inconsistent with the data and the best-fit full seismic moment tensor is dominantly explosive (˜60%) with a moment magnitude (MW) of 4.5. A pure explosion solution yields a scalar seismic moment of 1.8 × 1022 dyne-cm (MW4.1) and fits the data almost as well as the full solution. The difference between the full and explosion solutions is the predicted fit to observed tangential displacement, which requires some type of non-isotropic (non-explosive) radiation. Possible causes of the tangential displacement are additional tectonic sources, tensile failure at depth, and anisotropic wave propagation. Similar displacements may be hidden in the noise of the 2006 event. Future analyses of this type could be used to identify and characterize non-earthquake events such as explosions and mine collapses.
Dreger Douglas S.
Ford Sean R.
Walter William R.
No associations
LandOfFree
Source analysis of the Memorial Day explosion, Kimchaek, North Korea does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Source analysis of the Memorial Day explosion, Kimchaek, North Korea, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Source analysis of the Memorial Day explosion, Kimchaek, North Korea will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1264686