vP0/(m・s−1)

vS0/(m・s−1)

ρ/(g・cm−3)

ε/1

δ/1

The first group

The first layer

3000

1732

2.29

−0.2, −0.1, 0, 0.1, 0.2

−0.2

The second group

−0.1

The third group

0

The fourth group

0.1

The fifth group

0.2

The second layer

3500

2020

2.38

0

0