Insights into earthquake source physics from high-frequency ... - IRIS
Insights into earthquake source physics from high-frequency ... - IRIS
Insights into earthquake source physics from high-frequency ... - IRIS
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Estimates of slip velocities (Ben-Zion, JMPS 2001)<br />
For a steady-state problem, the frictional criterion . = f , with Weertman’s<br />
results for the limiting case c = c GR<br />
, is<br />
. ' # f [, ' ( 3*(c GR<br />
)B]# f [, ' ( 3*(c GR<br />
)v/c GR<br />
]<br />
The slip velocity inside the pulse adjusts itself to satisfy the above<br />
failure criterion and has a value given by<br />
v #c GR<br />
[, ' (. ' / f]/3*(c GR<br />
)<br />
For 20% contrast of shear wave velocities, ! 150 MPa (1.5 kbar), f = 0.6,<br />
'<br />
and . ! 10-50 MPa (100-500 bar), get v " 15-30 m/s (<strong>high</strong> but not unrealistic<br />
slip velocities!).<br />
Simulation results with regularized Prakash–Clifton friction (Ben-Zion and Huang, 2002)<br />
, '<br />
Evolution to <strong>high</strong> slip velocity<br />
Evolution to tensional stress
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