Location and size of the 1927 Lompoc, California, earthquake from tsunami data

Kenji Satake, Paul G. Somerville

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The Lompoc earthquake of 4 November 1927 (Ms 7.0) was one of the largest offshore events in California, and the associated tsunami was recorded in Hawaii as well as on the California coast. From tsunami travel times, the source location was estimated to be well offshore at about 34.2°N, 120.75°W, consistent with recent seismic waveform analysis. Waveform modelling of the tsunami also supports an outer continental shelf location. The seismic moment is estimated to be 3×1026dyne.cm, corresponding to a moment magnitude of 7.0. The tsunami computation reproduced the large tsunami in Hawaii, indicating that the observed large tsunami was due to bathymetry effects, particularly near Hilo Bay. The tsunami magnitude of 7.6 obtained from the Hawalian recordings by Abe thus appears to be an overestimate. -from Authors

Original languageEnglish
Pages (from-to)1710-1725
Number of pages16
JournalBulletin - Seismological Society of America
Volume82
Issue number4
Publication statusPublished - Aug 1992
Externally publishedYes

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