Coherent processing of regional signals at small seismic arrays

Autor:	Zoltan A. Der, R. H. Shumway, M. R. Hirano
Rok vydání:	1990
Předmět:	symbols.namesake Geophysics Fourier transform Geochemistry and Petrology Property (programming) Computer science Coherent processing symbols Structure (category theory) Equalization (audio) Electronic engineering Spectral structure Algorithm
Zdroj:	Bulletin of the Seismological Society of America. 80:2161-2176
ISSN:	1943-3573 0037-1106
DOI:	10.1785/bssa08006b2161
Popis:	Regional arrivals, similarly to short-period teleseismic P waves, have a spectral structure that the Fourier transforms of individual sensors at arrays for events located in limited source regions can be decomposed into source and site spectral factors. This structure has been demonstrated to be valid for Pn and Lg arrivals at NORESS. This property of regional arrivals can be exploited for: (a) Grouping events with respect to relative location; (b) Identifying events with differing source mechanisms; and (c) Finding differences in the source time functions between closely spaced events. Potentially useful techniques for accomplishing such analyses consist of computing site-averaged interevent coherences, interevent and intersite equalization methods combined with correlation techniques. The advantage of such approaches is that we need not know much about the propagation characteristics (Green's functions) along the paths to an array.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6cea72097b5385e0d5094cc5e6fd04b6 https://doi.org/10.1785/bssa08006b2161 Zobrazit plný text záznamu