[SSS15-18] Coexistence of slow earthquakes and megathrust earthquakes on the shallow plate boundary fault: Numerical simulation study on fault ruptures along the fault rock samples acquired by ocean drilling science
Keywords:Fault rupture simulation, Poroelastic, Megathrust earthquakes, Slow earthquakes
Fault rocks in the shallow accretionary prism can be regarded as poroelastic medium, in which porosity plays an important role to control its physical properties. Hence, we estimate physical properties of acquired fault rock samples, such as thermal conductivity and permeability, using XCT data and empirical conversion functions by Yabe et al. (2019, doi: 10.1186/s40623-019-1097-4) and others. We use profiles of estimated physical properties for the input to numerical models of Suzuki and Yamashita (2014, doi:10.1002/2013JB010871), which simulates fault ruptures in the poroelastic medium considering DH and TP. We will report the simulated slip behaviors on the fault.