Department of Geophysics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
CTI Engineering International, Kotou-ku, Tokyo 136-0071, Japan.
Science. 2016 Nov 18;354(6314):869-874. doi: 10.1126/science.aah4629. Epub 2016 Oct 20.
Field investigations and seismic data show that the 16 April 2016 moment magnitude (M) 7.1 Kumamoto earthquake produced a ~40-kilometer-long surface rupture zone along the northeast-southwest-striking Hinagu-Futagawa strike-slip fault zone and newly identified faults on the western side of Aso caldera, Kyushu Island, Japan. The coseismic surface ruptures cut Aso caldera, including two volcanic cones inside it, but terminate therein. The data show that northeastward propagation of coseismic rupturing terminated in Aso caldera because of the presence of magma beneath the Aso volcanic cluster. The seismogenic faults of the 2016 Kumamoto earthquake may require reassessment of the volcanic hazard in the vicinity of Aso volcano.
现场调查和地震数据表明，2016 年 4 月 16 日矩震级（M）7.1 熊本地震在日本九州岛阿苏火山口的西侧产生了一条长约 40 公里的沿东北-西南走向的日向富田走滑断裂带和新发现的断层。同震地表破裂带穿过阿苏火山口，包括其中的两个火山锥，但在那里终止。数据表明，同震破裂的向东北方向的传播在阿苏火山口停止，因为在阿苏火山群下方存在岩浆。2016 年熊本地震的发震断层可能需要重新评估阿苏火山附近的火山灾害。
