2024-03-29T09:15:07Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/684752022-11-17T02:08:08Zhdl_2115_68469hdl_2115_13714hdl_2115_1162014年7月8日に発生した北海道白老町付近(胆振地方中東部)の地震(MJMA 5.6)についてSeismic activity associated with the 2014 Shiraoi earthquake (MJMA 5.6) in middle east Iburi region, Hokkaido一柳, 昌義シェスタコフ, ニコライ奥山, 哲大園, 真子笠原, 稔高橋, 浩晃450A M5.6 shallow earthquake occurred on 8 July 2014 in middle east Iburi region, southwestern Hokkaido. Maximum seismic intensity of 5- was observed at Shiraoi town. Three temporal seismic stations had been installed in the focal region from 9 July 2014 to 30 April 2015. We determined 384 aftershock hypocenters by the double-difference tomographic hypocenter determination with proper seismic velocity structure. Relocated aftershocks were clearly distributed on a southeastern ward dipping plane with 5~10 km depth. This configuration agreed with a nodal plane of mainshock focal mechanism. Aftershocks occurred in surrounding part of a low seismicity patch. Mainshock was located deepest part of aftershock zone. These facts suggested that mainshock rupture propagated from deep to shallow, and a low seismicity patch was mainshock slip area. No clear correlation between this earthquake sequence and nearest active Tarumae volcano activity were identified.北海道大学大学院理学研究院Departmental Bulletin Paperapplication/pdfhttp://hdl.handle.net/2115/68475info:doi/10.14943/gbhu.81.17https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/68475/1/GBHU_81_p17-.pdf0439-3503AN0008976X北海道大学地球物理学研究報告8117262018-03-19jpnhttp://hdl.handle.net/2115/68481http://creativecommons.org/licenses/by-nc/4.0/publisher