GPS for real-time earthquake source determination and tsunami warning systems

Geoffrey Blewitt*, William C. Hammond, Corné Kreemer, Hans Peter Plag, Seth Stein, Emile Okal

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

106 Scopus citations

Abstract

We identify the key design aspects of a GPS-based system (and in the future, GNSS-based systems) that could contribute to real-time earthquake source determination and tsunami warning systems. Our approach is based on models of both transient and permanent displacement of GPS stations caused by large earthquakes, while considering the effect of GPS errors on inverted earthquake source parameters. Our main conclusions are that (1) the spatial pattern, magnitude, and timing of permanent displacement of GPS stations can be inverted for the earthquake source and so predict the 3D displacement field of the ocean bottom, thus providing the initial conditions for tsunami models, and (2) there are no inherently limiting factors arising from real-time orbit and positioning errors, provided sufficient near-field GPS stations are deployed. This signal could be readily exploited by GPS networks currently in place, and will be facilitated by the IGS Real-Time Project as it comes to fruition.

Original languageEnglish (US)
Pages (from-to)335-343
Number of pages9
JournalJournal of Geodesy
Volume83
Issue number3-4
DOIs
StatePublished - Mar 5 2009

Keywords

  • Earthquake
  • GNSS
  • GPS
  • Real-time
  • Tsunami
  • Warning system

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology
  • Computers in Earth Sciences

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