Fault Zone Complexity and Earthquake Ruptures
نویسندگان
چکیده
منابع مشابه
Earthquake ruptures modulated by waves in damaged fault zones
Faults are usually surrounded by damaged zones of lower elastic moduli and seismic wave velocities than their host rocks. If the interface between the damaged rocks and host rocks is sharp enough, earthquakes happening inside the fault zone generate reflected waves and head waves, which can interact with earthquake ruptures and modulate rupture properties such as rupture speed, slip rate, and r...
متن کاملSlip complexity in earthquake fault models.
We summarize studies of earthquake fault models that give rise to slip complexities like those in natural earthquakes. For models of smooth faults between elastically deformable continua, it is critical that the friction laws involve a characteristic distance for slip weakening or evolution of surface state. That results in a finite nucleation size, or coherent slip patch size, h*. Models of sm...
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The macroscopic behaviour of a fault zone can be described by a classic Coulomb friction law and static^kinetic rheology. The critical failure stress leading to the activation of a single shear zone segment then depends on the normal stress acting on the future fault plane. It is known that the seismic cycle on a main fault patch can be modulated by surrounding fault activations, leading to int...
متن کاملEarthquake Ruptures on Rough Faults
Natural fault surfaces exhibit roughness at all scales, with root-mean-square height fluctuations of order 10−3 to 10−2 times the profile length. We study earthquake rupture propagation on such faults, using strongly rate-weakening fault friction and offfault plasticity. Inelastic deformation bounds stresses to reasonable values and prevents fault opening. Stress perturbations induced by slip o...
متن کاملMonitoring fault zone environments with correlations of earthquake waveforms
S U M M A R Y We develop a new technique for monitoring temporal changes in fault zone environments based on cross-correlation of earthquake waveforms recorded by pairs of stations. The method is applied to waveforms of∼10 000 earthquakes observed during 100 d around the 1999M 7.1 Duzce mainshock by a station located in the core damage zone of the North Anatolian Fault and a nearby station. To ...
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ژورنال
عنوان ژورنال: Scientific Drilling
سال: 2007
ISSN: 1816-3459
DOI: 10.2204/iodp.sd.s01.18.2007