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2015 Research Highlights, Identifying the distribution of the Fujikawa-kako Fault Zone seamlessly across the coastline

Points of Interest

AIST has determined the continuity and configuration of the southern end of the Fujikawa-kako Fault Zone (Iriyamase Fault), which has the highest vertical slip-rate in Japan. As a result, we revealed the continuity of the fault zone and the Suruga Trough.

Figure of Distribution of the active faults in the coastal area of the Fujikawa River, and the positional relationship between them and the Suruga Trough.
Figure: Distribution of the active faults in the coastal area of the Fujikawa River, and the positional relationship between them and the Suruga Trough.

The Fujikawa-kako Fault Zone is one of the most active fault zones, distributed around the river-mouth of the Fujikawa River across the Shinkansen (Bullet train) and highways. While many surveys have been conducted as an importance to reducing damages by geohazard (earthquake and Tsunami), the continuity of the fault around the coastline remains uncertain before the AIST’s new research.

AIST conducted seismic reflection surveys using boats to reveal the active faults around the coastline. As a result of the survey, we determined the continuity of fault zones across the coastline. And we found Zenpukuji-oki fault active in the sea area which is not active on land area. These data make us recognize the importance of measures to prevent the great earthquake in this area.

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Contact

Masanori Ozaki, Chief Senior Researcher  
Masanori Ozaki
Chief Senior Researcher
Geoinformatics Research Group, Research Institute of Geology and Geoinformation

AIST Tsukuba Central 7, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8567, Japan

E-mail: igg-webmaster-ml*aist.go.jp (Please convert "*" to "@".)
TEL: +81-29-861-3620
Web: https://unit.aist.go.jp/igg/cie/


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