Rupture Process of Moderate-Size Earthquakes in Kanto Region obtained from a Back-projection Method using the MeSO-net data
村越, 匠 ,
西澤, 航 ,
岩瀨, 康行江口, 孝雄
41 , 2017-09 , 防衛大学校
The current study aims to obtain the rupture process of moderate-size earthquakes in space and time byusing waveforms in the Metropolitan Seismic Observation Network (MeSO-net). The MeSO-net, in whichall stations were established in 2012, is high-density seismograph network in and around the Tokyometropolitan area, Japan. The average station-to-station distances in MeSO-net are several kilometers.The average intervals are less than a quarter of existing seismic networks in Japan, where the averagedistances in K-net and KiK-net are about 20 km. Then, we analyze the fault motion of moderate-sizeearthquakes in and around Kanto area, Japan by applying the back-projection method to seismicwaveforms in MeSO-net. We construct detail images of the rupture process of moderate-size earthquakes.As a result, the spatial resolution of the rupture process for M5.1 earthquake is 0.5 km.