Deep Low-Frequency Earthquakes Associated with the Eruptions of Shinmoe-dake in Kirishima Volcanoes

• DOI: 10.31223/osf.io/f9m3y
• Publication Date: 2019-10-06T10:08:43Z
• Authors: Ryo Kurihara; Kazushige Obara; Akiko Takeo; Yusaku Tanaka
• Keywords: Sill

Deep low-frequency (DLF) earthquakes occur beneath the Kirishima volcanoes in southwest Japan at depths of 10–30 km. In this study, we aim to reveal relationship between DLF and volcanic activity including eruptions by relocating hypocenters using network correlation coefficient method detecting comprehensively matched filter technique. Hypocenters are found be concentrated some separated small clusters within 10–15 20–27 Activation deeper had been observed for approximately two years from December 2009, during which various styles occurred. Such a two-year increase seismicity was well correlated with crustal deformation because volume change magma reservoir. The waveforms activation period were different those other time periods. activated mostly low dominant frequencies located four clusters. each cluster switched three times transition eruption styles. These results suggest that might near sills could triggered fluid flow changing paths complex processes. addition, associated 2018 2011 eruptions.