Reply to comment by Y. Ben-Zion on “Material contrast does not predict earthquake rupture propagation direction”

2006 ◽  
Vol 33 (13) ◽  
Author(s):  
Ruth A. Harris ◽  
Steven M. Day
Keyword(s):  
Propagation Direction ◽  
Earthquake Rupture ◽  
Rupture Propagation ◽  
Material Contrast

Physics of Earthquake Rupture Propagation

2018 ◽  
Vol 733 ◽  
pp. 1-3
Author(s):  
Shiqing Xu ◽  
Eiichi Fukuyama ◽  
Amir Sagy ◽  
Mai-Linh Doan
Keyword(s):  
Earthquake Rupture ◽  
Rupture Propagation

Spontaneous Complex Earthquake Rupture Propagation

2003 ◽  
Vol 160 (3) ◽  
pp. 579-602 ◽  
Author(s):  
S. Das
Keyword(s):  
Earthquake Rupture ◽  
Rupture Propagation

Models for earthquake rupture propagation

1997 ◽  
Vol 277 (1-3) ◽  
pp. 209-217 ◽  
Author(s):  
J.D. Morgan ◽  
D.L. Turcotte ◽  
J.R. Ockendon
Keyword(s):  
Earthquake Rupture ◽  
Rupture Propagation

scholarly journals Sequences of seismic and aseismic slip on bimaterial faults show dominant rupture asymmetry and potential for elevated seismic hazard

2021 ◽  
Author(s):  
Mohamed Abdelmeguid ◽  
Ahmed Elbanna
Keyword(s):  
Seismic Hazard ◽  
Normal Stress ◽  
Nucleation Site ◽  
Rupture Propagation ◽  
Aseismic Slip ◽  
Earthquake Physics ◽  
Slip Rates ◽  
Seismicity Pattern ◽  
Sequence Of Events ◽  
Material Contrast

We perform numerical simulations of sequences of earthquake and aseismic slip on planar rate and state faults separating dissimilar material within the 2-D plane strain approximation. We resolve all stages of the earthquake cycle from aseismic slip to fast ruptures while incorporating full inertia effects during seismic event propagation. We show that bimaterial coupling results in favorable nucleation site and subsequent asymmetric rupture propagation. We demonstrate that increasing the material contrast enhances this asymmetry leading to higher slip rates and normal stress drops in the preferred rupture propagation direction. The normal stress drop, induced by the bimaterial effect, leads to strong dynamic weakening of the fault and may destabilize the creeping region on a heterogeneous rate and state fault, resulting in extended rupture propagation. Such rupture penetration into creeping patches may lead to more frequent opening of earthquake gates, causing increased seismic hazard. Furthermore, bimaterial coupling may lead to irregular seismicity pattern in terms of event length, peak slip rates,and hypocenter location, depending on the properties of the creeping patches bordering the seismogenically active part of the fault . Our results highlight robust characteristics of bimaterial interfaces that persist over long sequence of events and suggest the need for further exploration of the role of material contrast in earthquake physics and models of seismic hazard.

Sign in / Sign up

Export Citation Format

Share Document