The M6.1 earthquake triggered by volcanic inflation of Iwate Volcano, northern Japan, observed by satellite radar interferometry

DOI Web Site Web Site 被引用文献10件

この論文をさがす

抄録

<jats:p>Ground uplift and earthquake swarm activity has continued around Mt. Iwate volcano, northern Japan, since February 1998. On September 3, 1998 a M6.1 earthquake occurred southwest of the volcano. Satellite radar interferometry acquired by JERS‐1 reveals volcanic and coseismic deformation to the west of the summit, which is concordant with displacements observed by GPS. We analyzed geodetic observations including InSAR, GPS, and EDM to model the source of the surface deformation. The inferred model shows a 0.033km³ volumetric increase of an inflation (Mogi) source at a depth of 7.9km from April 1998 to the occurrence of the M6.1 earthquake. We find that the inflation increased Coulomb failure stress by 0.33MPa (7% of the coseismic stress drop) at the hypocenter. This result suggests the inflation promoted the rupture of a known Quaternary fault.</jats:p>

収録刊行物

被引用文献 (10)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ