4:45 PM - 5:00 PM
[SSS31-24] Continuation of Submarine Active Fault in the Suruga Trough towards Inland Area
Keywords:active fault, submarine active fault, Suruga trough, Fujikawa-kakou Fault Zone, plate boundary
Therefore, we consider that the active faults composing the east line of the fault zone may be gravitational fault related to volcanic activity of Mt. Fuji. The submarine active fault in Suruga trough extends northward to the mouth of Yui river where Iriyama fault, the southern part of the west line of the Fujikawa-kakou Fault Zone is located. Active fault trace along the Iriyama fault is hardly recognizable due to its low slip-rate. We also newly found consistent left-lateral stream offsets along Minobu, Neguma and Tashirotoge faults previously known as thrust in the southern Fossa Magna zone between Itoigawa-Sizuoka Tectonic Line and Fujikawa river. In conclusion, it is necessary to collect more dependable evidence for discussion about location of the plate boundary in the northern margin of the Philippine Sea Plate.