Understanding of the mechanisms of slow earthquakes in terms of 3D fluid migration

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K17792
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Solid earth and planetary physics
• Research Institution: Japan Agency for Marine-Earth Science and Technology (2017); Kyoto University (2016)
• Principal Investigator: MORISHIGE Manabu 国立研究開発法人海洋研究開発機構, 数理科学・先端技術研究分野, ポストドクトラル研究員 (70746544)
• Research Collaborator: van Keken Peter E.
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 短期的スロースリップ / 沈み込み帯 / 水の移動

Outline of Final Research Achievements

In SW Japan and Cascadia we observe that the amount of slip by short-term slow slip events (which is a type of slow earthquakes) is large where the slab bends away from the trench. In this study we demonstrated that these observations may reflect 3D fluid migration due to complex slab geometries by using numerical models including the effects of permeability anisotropy in the serpentine layer on top of the slab.

Free Research Field

固体地球物理学