Epicentre-source area from disturbance abnormity before Wenchuan Earthquake

Epicentre-source area from disturbance abnormity before Wenchuan Earthquake

We use disturbance abnormity with features of precursor wave from pointing-precursor observation of epicenter area and nearby within hundreds kilometers in Qinghai-Sichuan area before the Wenchuan Ms 8.0 earthquake on May 12, 2008 to search possible epicenter-source area. According to its abnormity...

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Veröffentlicht in:Geomatics and Information Science of Wuhan University 2012-03, Vol.37 (3), p.310-313
Hauptverfasser: Zhang, Xi, Li, Ruisha, Jia, Peng, Wang, Qingliang
Format: Artikel
Sprache:eng
Schlagworte:
Disturbances
Earthquake construction
Fracture mechanics
Least squares method
Mathematical analysis
Segments
Seismic phenomena
Vectors (mathematics)
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Zusammenfassung:We use disturbance abnormity with features of precursor wave from pointing-precursor observation of epicenter area and nearby within hundreds kilometers in Qinghai-Sichuan area before the Wenchuan Ms 8.0 earthquake on May 12, 2008 to search possible epicenter-source area. According to its abnormity vector, extent, time, space-location and the distribution characteristics of tectonic fracture, aided by construction of source-spreading function and inversion of quasi-Newton least square method. Computed epicenter-source is located on the northern segment of Longmenshan fracture, about 134 km away from real epicenter, occurred nearly 13 hours before this earthquake.
ISSN:1671-8860