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2003•Northwestern Seismological JournalRequires access

EVOLUTION CHARACTERISTICS OF SEISMICITY PATTERN BEFORE WEST TO KUNLUN MOUNTAIN PASS M_S8.1 EARTHQUAKE

Dong Zhi

Open publisher page 1 citations

Abstract

Seismogenic process of west to Kunlun Mountain Pass MS8.1 earthquake is consists of three evolutionary stages for seismicity pattern.The first stage is background formed by MS≥6 earthquake from 1959;the second stage is pregnant formed by MS≥5 earthquakes from in 1994, and the third stage,imminent earthquake gap lasts 4 months before the MS8.1 earthquake.At the later period of the pregnant gap,seismic bands in 1～2 years appeared in Qinghai-Xizang block and western China. Along with the formation of the imminent earthquake gap, no small earthquake occurred in the region.The timespace evolutionary feature of MS8 earthquakes in western China is discussed at the end.

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Seismogenic process of west to Kunlun Mountain Pass MS8.1 earthquake is consists of three evolutionary stages for seismicity pattern.The first stage is background formed by MS≥6 earthquake from 1959;the second stage is pregnant formed by MS≥5 earthquakes from in 1994, and the third stage,imminent earthquake gap lasts 4 months before the MS8.1 earthquake.At the later period of the pregnant gap,seismic bands in 1～2 years appeared in Qinghai-Xizang block and western China. Along with the formation of the imminent earthquake gap, no small earthquake occurred in the region.The timespace evolutionary feature of MS8 earthquakes in western China is discussed at the end.

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Available abstract

Seismogenic process of west to Kunlun Mountain Pass MS8.1 earthquake is consists of three evolutionary stages for seismicity pattern.The first stage is background formed by MS≥6 earthquake from 1959;the second stage is pregnant formed by MS≥5 earthquakes from in 1994, and the third stage,imminent earthquake gap lasts 4 months before the MS8.1 earthquake.At the later period of the pregnant gap,seismic bands in 1～2 years appeared in Qinghai-Xizang block and western China. Along with the formation of the imminent earthquake gap, no small earthquake occurred in the region.The timespace evolutionary feature of MS8 earthquakes in western China is discussed at the end.

Key concepts: Induced seismicity, Seismology, Geology, Intraplate earthquake, Seismic gap, Interplate earthquake, Mountain pass, Stage (stratigraphy)

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