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Seismic hazard analysis of Kyrgyzstan using data from the 2006 Mw 5.8 Kochkor earthquake
Mellors, Robert J.
Frost, Eric G.
Valdes, Julio R.
Using seismic data from the 2006 Mw 5.8 Kochkor, Kyrgyzstan earthquake, two studies were done: (1) Source parameter study of the Kochkor earthquake and (2) determination of Arias intensity attenuation relation for Kyrgyzstan. In the first study seismic event location using both single-event (absolute) and double-difference (relative) location techniques were done in order to estimate fault geometry and evaluate effects such as directivity that may enhance ground shaking. Results show that the rupture zone was dipping south at an approximate angle of 45° (+/- 5°). Aftershock locations also appear to be useful for determining rupture propagation. Comparison between the results and geological observations determined that the earthquake occurred on the South Kochkor fault. The second study uses the seismic data to determine a specific Arias intensity attenuation relationship for Kyrgyzstan. Comparison of Arias intensity (Ia) calculations using several attenuation relationships with observed Arias intensity obtained from seismic data of the Kochkor earthquake show that the attenuation relationship that best fits Kyrgyzstan is: logIa = -4.2 + M - 2logr + 0.44P. The relationship is tested for two ( 1992 Suusamyr and 2006 Kochkor) earthquakes to determine correlation with landslides reports. Results are consistent with both earthquake-triggered landslide reports.
Arifandy Aulia used a digital elevation map [DEM] of Kyrgystan for his base map [Figure 2, Page 3]. He did not identify the source for the DEM. 1:3,922,000
San Diego State University
Master of Science (M.S.) San Diego State University, 2010
Arias Intensity Attenuation
Earthquake triggered landslides
Earthquake building damage
KNET seismic stations
Kyrgyz Seismic Network
Asia – Central Asia – Kyrgyzstan – Kochkor
Kochkor Earthquake Epicenter 42.17N76.06W
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