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[1]XIANG Ya,WANG Bin,YANG Runhai,et al.Comparison of Propagation Characteristics of Signals Triggered by Air-gun Active Source and Natural Earthquakes[J].Journal of Seismological Research,2017,40(04):605-612.

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Comparison of Propagation Characteristics of Signals Triggered by Air-gun Active Source and Natural Earthquakes

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 40 Number of periods: 2017 04 Page number: 605-612 Column: 主动源专栏 Public date: 2017-09-20

Title:: Comparison of Propagation Characteristics of Signals Triggered by Air-gun Active Source and Natural Earthquakes

Author(s):: XIANG Ya¹; WANG Bin²; YANG Runhai²; WANG Weitao³; YANG Haiyan¹; (1.School of Resource Environment and Earth Sciences,Yunnan University,Kunming 650091,Yunnan,China)(2.Yunnan Earthquake Agency,Kunming 650024,Yunnan,China)(3.Institute of Geophysics,China Earthquake Administration,Beijing 100081,China)

Keywords:: Binchuan active transmitting seismic station; airgun excitation; earthquake signals; Hierarchical clustering; signal stacking; waveform characteristic; S-transform

CLC:: P315.31

DOI:: -

Abstract:: This article analyzes the waveform and frequency characteristics of the singles triggered by air-gun excitation and equivalent natural earthquake by S-transform.We stack the signals of other stations and analyze the propagation distance of air-gun signals after linear stacking and phase-weighted stacking based on clustering analysis to the reference station.The results show that:(1)the dominant frequency of air-gun signal is 3-6 Hz,and the station with distance of 151 km can receive the signal and its attenuation is slow.While the dominant frequency of equivalent natural earthquake is higher than air-gun signals,it is 10-20Hz with distance of 7.7km.Its propagation distance reaches 60km and its attenuation is faster.(2)After stacking the same number of signals about 2000 times by linear stacking and phase weighted stacking,the stations with distance of 225km and 350km can receive the air-gun signals.Compared with the signals from natural earthquakes,the signals of the air-gun are rich,the attenuation is slow and the propagation distance is far.Applying airgun source can study a wider range of crustal medium structures.

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Last Update: 2017-09-20