The last 6000 years record of tsunami events in the Kaniga-ike pond along the Nankai Trough

Hiromi MATSUOKA

Presentation information

Poster

Symbol S (Solid Earth Sciences) » S-SS Seismology

[S-SS30_29PO1] New perspective of great earthquakes along subduction zones

Tue. Apr 29, 2014 6:15 PM - 7:30 PM Poster (3F)

Convener:*Kanagawa Kyuichi(Graduate School of Science, Chiba University), Takashi Furumura(Center for Integrated Disaster Information Research (CIDIR) Interfaculty Initiative in Information Studies, The University of Tokyo), Shuichi Kodaira Shuichi(Institute for Research on Earth Evolution Japan Agency for Marine-Earth Science and Technology), Masanobu Shishikura(Active Fault and Earthquake Research Center, GSJ/AIST)

View the poster hall map

6:15 PM - 7:30 PM

[SSS30-P20] The last 6000 years record of tsunami events in the Kaniga-ike pond along the Nankai Trough

*Hiromi MATSUOKA¹ (1.Kochi Univ.)

Keywords:Nankai Trough, Tsunami sediment

In order to reveal pre-historic record of Nankai Trough earthquakes, we collected 46 vibrocore samples from the Kaniga-ike pond. Stratigraphical study and radiocarbon dating of these samples revealed that sediment of Kaniga-ike pond recorded 17 tsunami events during the last 6000 years. These 17 events repeated almost constant intervals through 300 years. A 2000 years ago event formed remarkable thick tsunami sequence, and also shows an exclusive event in the past 6000 years.