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Table 2 Properties of the used air-saturated porous materials

From: Numerical simulations to explain the coseismic electromagnetic signals: a case study for a M5.4 aftershock of the 2016 Kumamoto earthquake

Propertiespa1pa2pa3pa4pa5pa6
Porosity ϕ (%)311111
Solid density ρs (103 kg/m3)2.12.72.72.72.752.8
Static permeability k0 (10−12 m2)10−310−410−410−410−410−4
Solid bulk modulus Ks (GPa)8.010.015.050.060.060.0
Frame bulk modulus Kfr (GPa)5.67.09.036.042.048.0
Shear modulus G (GPa)2.15.07.022.027.033.0
Air viscosity η (10−3 Pa s)0.0180.0180.0180.0180.0180.018
Tortuosity α488888
Bulk conductivity σ (S/m)0.010.010.010.010.010.0001
Fast P wave quality factor Qpf120200240280320400
S wave quality factor Qs90150180210240300
  1. Parameters such as fluid density ρf = 1.29 kg/m3, fluid bulk modulus Kf = 0.15 MPa, fluid permittivity κf= 1 and solid permittivity κs = 4 are used for all air-saturated porous materials