Japan Geoscience Union Meeting 2014

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Poster

Symbol H (Human Geosciences) » H-SC Social Earth Sciences & Civil/Urban System Sciences

[H-SC25_30PO1] Human environment and disaster risk

Wed. Apr 30, 2014 6:15 PM - 7:30 PM Poster (3F)

Convener:*Aoki Tatsuto(School of Regional Development Studies, Kanazawa University), Yasuhiro Suzuki(Nagoya University), Mamoru Koarai Mamoru(Geographic Information Analysis Research Division, Geography and Crustal Dynamics Research Center, Geographical Survey Institute), Toshihiko Sugai(Department of Natural Environmental Studies, Institute of Environmental Studies, Graduate School of Frontier Science, The University of Tokyo), Hiroshi Une(Geospacial Information Authority of Japan), Yoichi Nakamura(Department of Earth Sciences, Utsunomiya University), Jun Matsumoto(Deaprtment of Geography, Tokyo Metropolitan University), Shintaro Goto(Department of Environmental Systems Faculty of GEO-Environmental Science Rissho University), Keitarou Hara(Faculty of Informatics, Tokyo University of Information Sciences)

6:15 PM - 7:30 PM

[HSC25-P09] Reconstruction of paleo earthquake intensity

*Yoshio INOUCHI1, Yuka OKUMURA2, Katsuhiko NAMEKI3 (1.Faculty of Human Sciences, Waseda University, 2.School of fHuman Sciences, Waseda university, 3.Graduate School of Human Sciences, Waseda University)

Keywords:paleo earthquake, intensity of quake, sediment

Many drastic earthquakes have been occurred historically in Japan. In order to reduce damages caused by those earthquakes, data concerning frequency, magnitude and influenced areas of each earthquake are inevitable. Here, we report measuring method of paleo intensity of historic earthquakes at arbitrary selected stations based on empirical formulas. Based on data regarding position of epicenter and magnitude of each paleo earthquake, intensity of paleo earthquake at arbitrary site is estimated. At the beginning, these data were used to recognize earthquake triggered turbidites at several lakes. The results show that lower threshold of triggering turbidites are 45gal in Lake Biwa and 79gal in Lake Inawashiro, respectively. Usage of this kind of method will enable us to reconstruct paleo earthquake data which have no written record.