Empirical Green function deconvolution of broadband surface waves: rupture directivity of the 1992 Landers, California (Mw = 7.3), earthquake

A. A. Velasco, C. J. Ammon, T. Lay

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

The paper presents a simple method to determine gross temporal and spatial characteristics of faulting that can uniquely define the fault plane for a relatively large earthquake. The technique involves deconvolution of teleseismic and regional broadband surface waves (and/or body waves) of a small event (an empirical Green function) from the corresponding signals at the same stations for a large mainshock. The procedure is applied to the 28 June 1992 Landers, California (Mw = 7.3), earthquake. The Landers earthquake source duration lasted about 25 sec, and was dominated by two subevents with predominantly north-northwestward rupture extending 60 to 70 km. The subevents show counterclockwise rotations of at least 12° in strike that correlate well with mapped surface rupture. -from Authors

Original languageEnglish (US)
Pages (from-to)735-750
Number of pages16
JournalBulletin - Seismological Society of America
Volume84
Issue number3
StatePublished - Jan 1 1994

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Green function
directivity
Deconvolution
deconvolution
Green's function
Surface waves
surface wave
surface waves
rupture
Earthquakes
Green's functions
earthquakes
broadband
earthquake
Faulting
body wave
fault plane
faulting
stations

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

Cite this

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