Insights into earthquake source physics from high-frequency ... - IRIS

S lip (m)
S lip velocity (m/s)
S lip (m)
f s
–f d
= 0.1; f s
, ( . 6
0.04
0.02
50dt
100dt
200dt
400dt
800dt
1200dt
1600dt
H omogeneous case
= 9 MPa
0
400 10 300 200 100 0 100 200 300 400
5
0
400 300 200 100 0 100 200 300 400
0.04
0.02
50dt
100dt
200dt
400dt
800dt
1200dt
1600dt
P osition along fault (m)
5% contrast
R upture potency (km ×cm)
Final propagation distance / source size
8
0.5
7
0.45
6
0.4
5
0.35
4
0.3
3
0.25
2
0.2
1
0.15
←
← τ ∞
←
←
→ D ivergence
= 68 M P a
τ ∞
= 65 M P a
←
negative dirction
positive direction ←τ ∞ = 62 M P a
f s
− f d
= 0.1
R atio R atio P osP P osD ot/N is/N egP egD ot is
4
3.5 1.9
3
1.7
1.6
2.5
1.4 2
1.5
1.2
→ D ivergence
1
0 1 2 3 4 5
1
M3aterial contrast 4 %
0 1 2 5 6 7 8
0
0.10 5 10 15 20
0 5 10 15 20
M aterial contrast (% M aterial contrast (% )
2
1.8
1.5
1.3
1.1
τ ∞= 68 M P a
τ ∞
= 65 M P a
τ ∞= 62 M P a
M aterial contrast (% )
S lip velocity (m/s)
0
400 20 300 200 100 0 100 200 300 400
10
0
400 300 200 100 0 100 200 300 400
P osition along fault (m)
S lip (m)
0.1
0.05
50dt
100dt
200dt
400dt
800dt
1200dt
1600dt
10% contrast
0
0.2
400 300 200 100 0 100 200 300 400
20% contrast
S lip (m)
0.1
0
400 300 200 100 0 100 200 300 400
P osition along fault (m)