| Budget Amount *help |
¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2018: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2017: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2016: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
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| Outline of Final Research Achievements |
Targeting at active Nukumi, Neodani, and Kurozu faults that ruptured cascadingly in 1891 and resulted in one of the largest inland earthquakes in the Japanese written history, the M 8.0 Nobi earthquake, we conducted on-fault trench excavations as well as pit excavations and coring at near-fault sackung features to reveal detailed rupture histories of those faults prior to the 1891 event. Our results show that the Kurozu fault ruptured only twice in the last 30,000 to 40,000 years whereas the Nukumi and Neodani faults have a rupture interval of as short as 1000 to 3000 years. In particular, at least the latest three ruptures on those two faults, including the 1891 event, all share timing, suggesting that cascade rupture of the Nukumi and Neodani faults might be a rule rather than an exception.
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