Dense Earthquake Monitoring Network in Town and Township of Yibin and Analysis of Earthquake Signals
Earthquake monitoring networks has been established in Yibin area.A dense earthquake monitoring network for town and township is formed by eight monitoring stations in the rural region prone to seismic activity.Different from traditional strong-motion arrays,each station contains ground point and floor point of adjacent school buildings.A total of 2 000 records of ground and floor acceleration signals induced by 136 earthquakes were obtained,categorized into four types based on signal characteristics:epicenter zone,near zone,far zone,and very far zone signals.The data from the epicenter and near zone signals are valuable strong ground and floor acceleration signals and of large amount,with 56 records of ground and floor signals in region with epicenter distance less than 10 km.This paper selects representative data to analyze the characteristics of ground average response spectrum.The typical attenuation curve of peak ground acceleration with respect to epicenter distance is given.The very far zone and far zone signals with relatively lower peak values of ground and/or floor acceleration are also discussed.
town and townshipdense earthquake monitoring networkepicenter zone signalsnear zone signalsaverage response spectrum
国家科技期刊平台
NSTL
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