Radial modes from the great 1994 Bolivian earthquake: No evidence for an isotropic component to the source

Emile A. Okal*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

We investigate a possible isotropic component in the source of the Bolivian earthquake of 09 June 1994 through a study of the radial modes pS0 (p = 0, 1) excited by the event. Our study departs from previous similar attempts by making use of a time series of sufficient duration (over 116 days) to sample the shape of the spectral line of the fundamental radial mode 0S0, and by combining measurements of two radial modes, thereby lifting the trade-off between deviatoric and isotropic sources of excitation. Our result (an isotropic component of 0.5 ± 1.3% of the main double-couple) fails to identify a significant change in volume in the source of this, the largest deep earthquake ever recorded.

Original languageEnglish (US)
Pages (from-to)431-434
Number of pages4
JournalGeophysical Research Letters
Volume23
Issue number5
DOIs
StatePublished - Mar 1 1996

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

Fingerprint Dive into the research topics of 'Radial modes from the great 1994 Bolivian earthquake: No evidence for an isotropic component to the source'. Together they form a unique fingerprint.

Cite this