SOURCE RADIATION AND RESPONSES OF WAVE PROPAGATION

作者：CHEN Sheng-zao Gail M Atkinson

摘要：Recordings of seismic waves propagating from earthquake source to a station at the earth's surface are a system response function.The convolution operator in time domain can be simplified as a multiplication operator in frequency domain.We discuss in frequency domain the separation of source,path and site effects for global scaling of earthquake source radiation.Also discussed are source scaling model,faulting mechanism,and the H/V inversion problems with crustal and near surface structures.Gross features of apparent source spectra appear to be not much region-dependent although there may be difference between tectonic styles within a region of tectonic mixture for which we need further study as data accumulate.Vertical spectra may be a better approach to approximate source radiation,as it has less crustal amplification effects than horizontal spectra.The H/V ratio is evidently a comprehensive indicator of amplification effects from near surface to deep structure.This gives it potential as an inversion tool to deduce site crustal structure.

发文机构：Geomatrix Consultants

关键词：EarthquakeSOURCESEISMICwavepropagationATTENUATIONCRUSTALstructurenearsurfaceAMPLIFICATIONEarthquake sourceseismic wave propagationattenuationcrustal structurenear surface amplification

分类号： P315.3[天文地球—地震学][天文地球—固体地球物理学][天文地球—地球物理学]