2000年有珠山噴火に伴う火山性地震の観測データについて

概要

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ln this study, we investigated and analyzed the data of volcanic earthquakes and strong groundmotions observed by the Kyoshin Net (K-Net) around the occasion of the eruption of Mt. Usu,Hokkaido in 2000. The first eruption occurred at 13:10 on March 31, and 101 earthquakes wereobservcd by the K-Net from March 29 through April 1. We investigated the magnitudes, epicenters,focal depths and their relations with eruptions. We selected an earthquake that has the largestmagnitude (4.6) among the observed data and then executed spectral analyses of the acceleration dataof the strong motion observed at the Date seismometer. We obtained the Fourier speetra andresponse spectra of the acceleration data for each of the three directions (EW, NS, UD). We alsocompared the velocity response spectrum of the EW direction considering the geo-technicalconditions of the seismometer site with the corresponding Osaki's spectrum.
室蘭工業大学の論文
2001-11-30