The location and source parameters of the Lompoc, California, earthquake of 4 November 1927

D. V. Helmberger, P. G. Somerville, Edward Garnero

Research output: Chapter in Book/Report/Conference proceedingChapter

21 Scopus citations

Abstract

The relocation, magnitudes, and the style of faulting of the Lompoc earthquake are reported from a sparse assortment of teleseismic and regional seismograms. Recordings of modern events have been used for comparison with the 1927 records. The results indicate a north-northwesterly striking reverse event located about 40km west of Point Conception, a body-wave moment of 1×1026dyne-cm, a trapezoidal time history of (2,2,2) sec. and a source depth of 10km. The weak beginning of the Pnl wavetrain at Berkeley indicates some source complexity, which is characteristic of many large events. The fault parameters are strike =N20°W, dip =66°NE, and rake =95°. The body waves of the Loma Prieta event (Ms =7.1) appear distinctly larger than those of the Lompoc event. -from Authors

Original languageEnglish (US)
Title of host publicationBulletin - Seismological Society of America
Pages1678-1709
Number of pages32
Volume82
Edition4
StatePublished - 1992
Externally publishedYes

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

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    Helmberger, D. V., Somerville, P. G., & Garnero, E. (1992). The location and source parameters of the Lompoc, California, earthquake of 4 November 1927. In Bulletin - Seismological Society of America (4 ed., Vol. 82, pp. 1678-1709)