Dependency of Near-Field Ground Motions on the Structural Maturity of the Ruptured Faults
作者： M. Radiguet , F. Cotton , I. Manighetti , M. Campillo , J. Douglas
DOI: 10.1785/0120080340
关键词: Seismic risk 、 Tectonics 、 Strong ground motion 、 Near and far field 、 Geology 、 Fault (geology) 、 Seismology 、 Slip (materials science) 、 Seismotectonics 、 Amplitude
摘要: Little work has been undertaken to examine the role of specific long-term fault properties on earthquake ground motions. Here, we empirically influence structural maturity faults strong motions generated by rupture these faults, and compare that other source (slip mode, blind versus surface rupturing). We analyze near-field recorded at rock sites for 28 large (Mw 5.6–7.8) crustal earthquakes various slip modes. The broken those is classified into three classes (mature, intermediate, immature) based combined knowledge age, rate, cumulative slip, length faults. empirical prediction equation Boore et al. (1997). At all frequencies, immature produce 1.5 times larger than mature appears be associated with differences in ground-motion amplitude style faulting (factor 1.35 between reverse strike-slip earthquakes) occurrence 1.2 surface-rupturing earthquakes). However, mode are dependent parameters, suggest effect may only apparent, actually resulting from control. conclude an important parameter should considered seismic hazard assessment.
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