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

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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 / <strong>source</strong> 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)
Simulations with imposed super-shear shear rupture in the nucleation zone can excite also a weak super-shear shear pulse in the opposite direction wrinkle-like pulse with V r ! C GR crack-like front with V r ! P - crack-like front with V r ! P +
Page 1 and 2: Insights into earthquake source phy
Page 3 and 4: Basic relations Total strain has el
Page 5 and 6: Order of magnitude estimates of con
Page 7 and 8: Conclusions I • The ratio of radi
Page 9 and 10: Can be relevant to numerous importa
Page 11 and 12: Wrinkle-like rupture pulse complian
Page 13 and 14: Estimates of slip velocities (Ben-Z
Page 15: Slip-weakening friction (Shi and Be
Page 19 and 20: The results are robust with respect
Page 21 and 22: Relations to field observations? Ne
Page 23 and 24: Damage generation for different dep
Page 25 and 26: com. fracture length (cm) 60 50 40
Page 27 and 28: Scott et al. (1994) Shapiro et al.
Page 29 and 30: Pulverized rocks in the Mojave sect
Page 31 and 32: Asymmetric dynamic earthquake trigg
Page 33: Conclusions II • Ruptures along a

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

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