An outcrop of the active Futagawa Fault, which ruptured during the 2016 Kumamoto earthquake

Oohashi, Kiyokazu; Tamura, Tomonori

doi:10.5575/geosoc.2016.0055

Cited by 4 publications

(1 citation statement)

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“…Similarly, fresh horizontal slickenlines with 3-16° plunges suggesting strike-slips were observed in an outcrop ∼500 m from the FFDP site soon after the earthquake (Oohashi & Tamura, 2016). In addition, one to four paleoseismic events prior to the 2016 earthquake in the past ∼10,000 years were detected on the Futagawa fault from trench excavation observations and radiocarbon dating results, and a recurrence interval of ∼2,000-4,000 years was inferred.…”

Section: Geological Settingmentioning

confidence: 77%

An Ancient >200 m Cumulative Normal Faulting Displacement Along the Futagawa Fault Dextrally Ruptured During the 2016 Kumamoto, Japan, Earthquake Identified by a Multiborehole Drilling Program

Shibutani

Lin

Sado³

et al. 2022

Geochem Geophys Geosyst

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The Southwest Japan arc and Ryukyu arc are located on the subduction zone where the Philippine Sea plate subducts beneath the Eurasian plate (or the Amurian subplate) at the Nankai Trough and Ryukyu Trench, respectively (Kamata & Kodama, 1999; Figure 1a). The Philippine Sea plate subducted beneath Kyushu from ∼6 Ma, and was rotated in the counterclockwise direction from north-northwest to west-northwest at ∼2 Ma (e.g., Kamata & Kodama, 1999;Wu et al., 2016). Volcanism in central Kyushu related to subduction of the Philippine Sea plate began at ∼5 Ma (Nakada & Kamata, 1991). At the junction of the two arcs, subduction of fluid-rich oceanic crust and sediments introduced large volumes of fluids into the Kyushu arc system, leading to voluminous volcanism and a locally extensional stress regime (Mahony et al., 2011). As a result, the Aso Volcano, one of the greatest

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Section: Geological Settingmentioning

confidence: 77%