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

doi:10.1029/2010GL043379

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

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

Geosciences

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190 Scopus citations

Abstract

The 27 February 2010 Chile (M_w 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 language	English (US)
Article number	L13301
Journal	Geophysical Research Letters
Volume	37
Issue number	13
DOIs	https://doi.org/10.1029/2010GL043379
State	Published - Jul 1 2010

All Science Journal Classification (ASJC) codes

Geophysics
General Earth and Planetary Sciences

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10.1029/2010GL043379

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abstract = "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.",

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T1 - Teleseismic inversion for rupture process of the 27 February 2010 Chile (Mw 8.8) earthquake

AU - Lay, T.

AU - Ammon, C. J.

AU - Kanamori, H.

AU - Koper, K. D.

AU - Sufri, O.

AU - Hutko, A. R.

PY - 2010/7/1

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AB - 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.

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

Abstract

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