Underestimated fault models for 'maximum-class' tsunami in the Japan Sea, resulted from Irikura and Miyake (2001) scaling relation

Kunihiko Shimazaki

Presentation information

Oral

Symbol H (Human Geosciences) » H-DS Disaster geosciences

[H-DS19] Tsunami and Tsunami Forecast

Wed. May 25, 2016 10:45 AM - 12:15 PM 201A (2F)

Convener:*Yuichi Namegaya(Institute of Earthquake and Volcano Geology, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology), Kentaro Imai(Japan Agency for Marine-Earth Science and Technology), Chair:Daisuke Inazu(UTokyo Ocean Alliance, The University of Tokyo), Tomohiro Takagawa(Port and Airport Research Institute)

12:00 PM - 12:15 PM

[HDS19-12] Underestimated fault models for 'maximum-class' tsunami in the Japan Sea, resulted from Irikura and Miyake (2001) scaling relation

*Kunihiko Shimazaki¹ (1.University of Tokyo)

Keywords:’maximum-class’ tsunami, Japan Sea, scaling relation

Application of Irikura and Miyake (2001) scaling relation for estimation of seismic moment of a large shallow crustal earthquake occurring on a vertical fault causes underestimation of seismic moment. Seismic deformations of the 1927 Tango, the 1930 North Izu, and the 1943 Tottori earthquakes are evaluated on the basis of Irikura and Miyake (2001) scaling relation and previously estimated fault areas (Abe, 1978; Kanamori, 1973). The scaling formula gives deformations smaller than one-fourth that observed geodetically.