Recurrence Pattern of Tsunami events of Nankai Earthquake recorded in lacustrine sediments along the eastern coast of the Kii Peninsula, southwest Japan.

Hiromi Matsuoka; Makoto Okamura; Mitsuo Tsuzuki; Hiroaki Uratani

Presentation information

[EE] Poster

S (Solid Earth Sciences) » S-SS Seismology

[S-SS08] [EE] Earthquake Modeling and Simulation

Mon. May 22, 2017 10:45 AM - 12:15 PM Poster Hall (International Exhibition Hall HALL7)

convener:Eiichi Fukuyama(National Research Institute for Earth Science and Disaster Prevention), John B Rundle(University of California Davis), Yukitoshi Fukahata(Disaster Prevention Research Institute, Kyoto University)

View the poster hall map

[SSS08-P12] Recurrence Pattern of Tsunami events of Nankai Earthquake recorded in lacustrine sediments along the eastern coast of the Kii Peninsula, southwest Japan.

*Hiromi Matsuoka¹, Makoto Okamura¹, Mitsuo Tsuzuki², Hiroaki Uratani² (1.Kochi University, 2.Disaster Mitigation Research Center, Nagoya University)

Keywords:Nankai Earthquakes, tsunami sediments, recurrence pattern

We studied on tsunami sediment in small lakes along the Nankai Trough for the reconstruction of prehistoric tsunami. Total 33 cores were collected from the three lakes named Ashihama-ike, Zasa-ike and Usuzuki-ike, which located on behind coastal ridge along the southeastern coast of Kii Peninsula.
These lakes preserved last 3500 years record of Nankai Earthquake tsunamis. Tsunami events are observed intervals of 3500-3000 yBP, 2700-2000 yBP and 1300-1000 yBP. Furthermore, each interval is composed 2-3 events that decrease in size. These recurrence mode of tsunami events indicate fractal-like patterns.