[H-SC03_30AM1] Living with Tsunami Hazards and Considerations for the Reconstruction and Restoration Process

[HSC03-05] 先進的な地震津波研究－地震津波の被害軽減を目指して－

*金田 義行¹、川口 勝義¹、荒木 英一郎¹、松本 浩幸¹、中村 武史¹、神谷 眞一郎¹、有吉 慶介¹、堀 高峰¹、兵藤 守¹、高橋 成実¹、馬場 俊孝¹、中野 優¹、崔 鎭圭¹、西田 修平¹ (1.海洋研究開発機構)

Based on lessons learned from the 2011 East Japan Earthquake/Tsunami, we recognized the importance of real time monitoring of these natural hazards. As a real time monitoring system, DONET1 was already deployed and DONET2 is being developed constructing the dense ocean floor networks around the Nankai trough Southwestern Japan. DONET observatories detected offshore tsunamis 15 minutes earlier than onshore stations at the 2011 East Japan Earthquake, and provided the significant information of the tsunami amplification process between off shore and on shore. Using these systems, we can detect not only early earthquakes and tsunamis but also low frequency tremors, slow earthquakes and micro earthquakes in the inter-seismic or pre-seismic stage, which provide useful information for the estimation of seismic stage. As the conclusion, the integration of the real time monitoring data and advanced simulations such as the recurrence cycle of mega thrust earthquakes, tsunami inundation, seismic response on buildings/cities and evacuation, is the very important methodology towards future disaster mitigation programs and related measures. We will explain disaster mitigation researches on earthquakes and tsunamis around the Nankai trough.