Japan Geoscience Union Meeting 2019

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[J] Oral

S (Solid Earth Sciences ) » S-CG Complex & General

[S-CG59] Reducing risks from earthquakes, tsunamis & volcanoes: new applications of realtime geophysical data

Thu. May 30, 2019 3:30 PM - 5:00 PM A08 (TOKYO BAY MAKUHARI HALL)

convener:Masashi Ogiso(Meteorological Research Institute, Japan Meteorological Agency), Naotaka YAMAMOTO CHIKASADA(National Research Institute for Earth Science and Disaster Resilience), Satoshi Kawamoto(Geospatial Information Authority of Japan), Mitsuyuki Hoshiba(Meteorological Research Institute), Chairperson:Naotaka Chikasada(National Res. Inst. for Earth Science and Disaster Resilience), Masashi Ogiso(Meteorological Research Institute, JMA)

3:30 PM - 3:45 PM

[SCG59-07] Enhancements of real time seismic intensity estimation using seismic intensity meters maintained by a local government – Case study on Tottori prefecture -

*Takao Kagawa1 (1.Tottori University Graduate School of Engineering)

Keywords:Local Government, Seismic Intensity Meter, Real Time, PLUM method, P wave

Enhancements of real time seismic intensity estimation using seismic intensity meters maintained by a local government is demonstrated. Dense observation network is desirable for upgrading accuracy and quality of Earthquake Early Warning System. Seismic intensity meters installed in all municipalities are the most suitable equipment for the purpose. The seismic intensity meters in Tottori prefecture are improved to broadcast packets with peak ground acceleration and JMA seismic intensity at every one second. The data are received at Tottori University and PLUM method is applied to the data for estimating JMA seismic intensity distribution at 1km grid points. In this study, two additional methodologies are introduced on the system. One is attenuation of seismic intensities from observed sites and propagation from every grids for estimation. Another is introduction of P wave amplitudes for seismic intensity estimation. Using the methodologies, we can obtain rapid and detailed seismic intensity distribution than before.