Earthquake Detection Probabilities in Japan

Abstract

Research Article| February 06, 2018 Earthquake Detection Probabilities in Japan Danijel Schorlemmer; Danijel Schorlemmer aGFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany, ds@gfz-potsdam.de, beutin@gfz-potsdam.degAlso at Southern California Earthquake Center, University of Southern California, 3651 Trousdale Parkway, MC‐0740, Los Angeles, California 90089‐0740. Search for other works by this author on: GSW Google Scholar Naoshi Hirata; Naoshi Hirata bEarthquake Research Institute, University of Tokyo, 1‐1‐1 Yayoi, Bunkyō‐ku, Tokyo 113‐0032, Japan, hirata@eri.u-tokyo.ac.jptsuru@eri.u-tokyo.ac.jp Search for other works by this author on: GSW Google Scholar Yuzo Ishigaki; Yuzo Ishigaki cSeismology and Volcanology Department, Japan Meteorological Agency, 1‐3‐4 Ōtemachi, Chiyoda‐ku, Tokyo 100‐8122, Japan, ishigaki@met.kishou.go.jp Search for other works by this author on: GSW Google Scholar Keiji Doi; Keiji Doi dŌsaka Regional Headquarters, Japan Meteorological Agency, 4‐1‐76 Ōtemae, Chūō‐ku, Osaka 540‐0008, Japan, keijidoi@met.kishou.go.jp Search for other works by this author on: GSW Google Scholar Kazuyoshi Z. Nanjo; Kazuyoshi Z. Nanjo eGlobal Center for Asian and Regional Research, Division of Earthquake Prediction Research, University of Shizuoka, 3‐6‐1 Takajō, Aoi‐ku, Shizuoka‐City 420‐0839, Japan, nanjo@u-shizuoka-ken.ac.jp Search for other works by this author on: GSW Google Scholar Hiroshi Tsuruoka; Hiroshi Tsuruoka bEarthquake Research Institute, University of Tokyo, 1‐1‐1 Yayoi, Bunkyō‐ku, Tokyo 113‐0032, Japan, hirata@eri.u-tokyo.ac.jptsuru@eri.u-tokyo.ac.jp Search for other works by this author on: GSW Google Scholar Thomas Beutin; Thomas Beutin aGFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany, ds@gfz-potsdam.de, beutin@gfz-potsdam.de Search for other works by this author on: GSW Google Scholar Fabian Euchner Fabian Euchner fInstitute of Geophysics, ETH Zürich, Sonneggstrasse 5, 8092 Zürich, Switzerland, fabian.euchner@sed.ethz.ch Search for other works by this author on: GSW Google Scholar Bulletin of the Seismological Society of America (2018) 108 (2): 702–717. https://doi.org/10.1785/0120170110 Article history first online: 06 Feb 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Danijel Schorlemmer, Naoshi Hirata, Yuzo Ishigaki, Keiji Doi, Kazuyoshi Z. Nanjo, Hiroshi Tsuruoka, Thomas Beutin, Fabian Euchner; Earthquake Detection Probabilities in Japan. Bulletin of the Seismological Society of America 2018;; 108 (2): 702–717. doi: https://doi.org/10.1785/0120170110 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract We present a complete history of earthquake detection probabilities and detection completeness levels for the Japanese seismic network from 1923 to, and including, 2014 in high resolution over space and time. In our study, we employ the probability‐based magnitude of completeness method developed by Schorlemmer and Woessner (2008). Using this method, for each station we derive detection capabilities over time from empirical data only, namely earthquake information, phase data, station information, and network‐specific attenuation relations. From the entire phase‐data history, we estimate the operational times of each station and then synthesize detection‐probability maps for specific magnitudes or completeness maps. We compute these maps for every month in the period 1923–1987 and for approximately every 10 days in the period 1988–2014.We document the improvement of the Japanese seismic network from its early stage in 1923, when the network reaches completeness levels for shallow seismicity of magnitude 4 only in the wider Tokyo area, to the recent years exhibiting completeness levels of approximately magnitude 1 in all of Japan. We provide detailed completeness estimates for the eight major periods of the Japanese seismic network, defined by the types of seismometers used and the location technique employed, and show the development of completeness levels for selected regions. Finally, we discuss the effects of the 2011 Tohoku‐Oki earthquake on completeness levels in Japan. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.