气枪震源地震波走时变化影响因素分析及地震相关的走时变化

Abstract

Abstract: The Binchuan Earthquake Transmitting Seismic Station is located in Dayindian reservoir, which 10 kilometers west of the Chenghai Fault. There are 3 earthquakes with magnitude of M_S4.2, M_L4.1 and M_L4.0 occurred around BETSS on 21st and 24th, August, 2014. Data collected from 10 mobile seismic stations from 8th, August, 2014 to 28th, February, 2015, are used to get travel time changes using waveform cross-correlation method. We calculated and analyzed influences of atmospheric pressure, water level of Dayindian reservoir and tidal stress on travel time changes using ray tracing method. After eliminating the effects of above factors, we deem that the possible reason of the increase of travel time in August 2018 is the the 3 earthquakes mentioned above.

Key words: Airgun source, Travel time change, Co-seismic effect

CLC Number:

P315.7

ZHOU Qing-yun, LIU Zi-feng, He Su-ge. Influence Factors of Velocity Variation of Airgun Seismic Waves and Travel Time Changes Related to Earthquakes[J]. EARTHQUAKE, 2018, 38(3): 144-157.

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Influence Factors of Velocity Variation of Airgun Seismic Waves and Travel Time Changes Related to Earthquakes

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