雲仙火山の浅部構造に対する擬似反射記録法の適用の試み

概要

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Pseudo Reflection Profiling (PRP) is introduced as an effective method for shallow seismic study of volcanoes. PRP is applied to seismic exploration records in Unzen Volcano in 1995 and two reflection profiles are obtained. A reflection profile of E-W line shows more complicated appearance of reflection phases in Heisei-Shinzan side than that in another side of the survey line. Another reflection profile of N-S line includes convex phases in the west of Heisei-Shinzan. Two of these reflections are common in both profiles and can be located at the boundary of the shallow aseismic region which was pointed out in the other geophysical study. Since these results are consistent with the previous reflection study and PRP requires free source location, PRP will be one of the useful method for surveying shallow structure of volcanoes.
特定非営利活動法人日本火山学会の論文
2004-06-30