By Agustín Udías, Raúl Madariaga, Visit Amazon's Elisa Buforn Page, search results, Learn about Author Central, Elisa Buforn,
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Published via the yankee Geophysical Union as a part of the Geophysical Monograph Series.
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This slip is intrinsically stable until r > re. At that point the slip may accelerate to instability if t* >/•, without further increase of the stress on the fault. These considerationssuggestthat two distinct phasesof stable slip can be identified leading to confinedunstable minimum size for the nucleation zone is less than the di- mensionsof the fault. , 1978]. Where the embedded creeping patch nucleatesunstable slip, the stiffnessof the system is given by the parameters of the slippingpatch(as in (13)) and not by the apparatus.
54 i I DIETERICH 31 ,u. 55 AND , 1 ms ---J I I , ,I I I---1ms ---• I I I I I ! I I c3 : 15 - f3 = 500 Fig. 6. 01. ca and f0 valuesindicated. a smooth and a roughfault, stick-slipslidingon the smooth fault is precededby relatively little measurablefault creep compared to the rough fault. On the rough fault, a long time interval of stable fault slip always precededthe stick-slip event, often to offsets comparable to the fault displacementassociatedwith the dynamic slip. Becauseof the difficulty in measuringthe small amountsof precursory creep on the smooth fault and thus in estimatingthe fault slip rate before the stick-slip event, we limit the present study to considerationof the rough fault data.
SameasFigure5, butforrecord 47-7. constitutiverelation are cutoffsat high slip rates to both the rate- and state-related effects. With the exceptionof Copyright American Geophysical Union Geophysical Monograph Series 3/4 Earthquake Source Mechanics Vol. 37 STATE VARIABLE FAULT RELATIONS TABLE1. Estimates of VelocityCutoffParameters andFrictionChanges. 01[Dieterich, 1981]. 73)=• c3 m 30/s. the cutoff parametersca and fa, identical numericalvalues of friction model parameterscan be used to fit both the quasistatic and dynamic observations.
Earthquake Source Mechanics by Agustín Udías, Raúl Madariaga, Visit Amazon's Elisa Buforn Page, search results, Learn about Author Central, Elisa Buforn,