Teleseismic inversion for rupture process of the 27 February 2010 Chile (Mw 8.8) earthquake

T. Lay, C. J. Ammon, H. Kanamori, K. D. Koper, O. Sufri, A. R. Hutko

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The 27 February 2010 Chile (Mw 8.8) earthquake is the fifth largest earthquake to strike during the age of seismological instrumentation. The faulting geometry, slip distribution, seismic moment, and moment-rate function are estimated from broadband teleseismic P, SH, and Rayleigh wave signals. We explore some of the trade-offs in the rupture-process estimation due to model parameterizations, limited teleseismic sampling of seismic phase velocities, and uncertainty in fault geometry. The average slip over the ∼81,500 km2 rupture area is about 5 m, with slip concentrations down-dip, up-dip and southwest, and up-dip and north of the hypocenter. Relatively little slip occurred up-dip/offshore of the hypocenter. The average rupture velocity is ∼2.0-2.5 km/s.

Original languageEnglish (US)
Article numberL13301
JournalGeophysical Research Letters
Issue number13
StatePublished - Jul 1 2010

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)


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