Static offsets produced by the February 27, 2010 Mw = 8.8 Maule, Chile
earthquake as measured by GPS and InSAR constrain coseismic slip
along a section of the Andean megathrust of dimensions 650 km (in
length) x 180 km (in width). GPS data have been collected from both
campaign and continuous sites sampling both the near-field and far
field. ALOS/PALSAR data from several ascending and descending tracks
constrain the near-field crustal deformation. Inversions of the geodetic
data for distributed slip on the megathrust reveal a pronounced slip
maximum of order 15 m at \~15-25 km depth on the megathrust offshore
Lloca, indicating that seismic slip was greatest north of the epicenter
of the bilaterally propagating rupture. A secondary slip maximum
appears at depth \~25 km on the megathrust just west of Concepción.
Coseismic slip is negligible below 35 km depth. Estimates of the
seismic moment based on different datasets and modeling approaches
vary from 1.8 to 2.6 x 10^22 Nm. Our study is the first to model
the static displacement field using a layered spherical Earth model,
allowing us to incorporate both near-field and far-field static displacements
in a consistent manner. The obtained seismic moment of 1.97 x 10^22
Nm, corresponding to a moment magnitude of 8.8, is similar to that
obtained by previous seismic and geodetic inversions.
%0 Journal Article
%1 pollitz_etal:2011
%A Pollitz, Fred F.
%A Brooks, Ben
%A Tong, Xiaopeng
%A Bevis, Michael G.
%A Foster, James H.
%A Bürgmann, Roland
%A Smalley, Robert
%A Vigny, Christophe
%A Socquet, Anne
%A Ruegg, Jean-Claude
%A Campos, Jaime
%A Barrientos, Sergio
%A Parra, Héctor
%A Soto, Juan C.
%A Cimbaro, Sergio
%A Blanco, Mauro
%D 2011
%J Geophysical Research Letters
%K seismology
%N 9
%P L09309+
%R 10.1029/2011GL047065
%T Coseismic slip distribution of the February 27, 2010 Mw 8.8 Maule,
Chile earthquake
%U http://dx.doi.org/10.1029/2011GL047065
%V 38
%X Static offsets produced by the February 27, 2010 Mw = 8.8 Maule, Chile
earthquake as measured by GPS and InSAR constrain coseismic slip
along a section of the Andean megathrust of dimensions 650 km (in
length) x 180 km (in width). GPS data have been collected from both
campaign and continuous sites sampling both the near-field and far
field. ALOS/PALSAR data from several ascending and descending tracks
constrain the near-field crustal deformation. Inversions of the geodetic
data for distributed slip on the megathrust reveal a pronounced slip
maximum of order 15 m at \~15-25 km depth on the megathrust offshore
Lloca, indicating that seismic slip was greatest north of the epicenter
of the bilaterally propagating rupture. A secondary slip maximum
appears at depth \~25 km on the megathrust just west of Concepción.
Coseismic slip is negligible below 35 km depth. Estimates of the
seismic moment based on different datasets and modeling approaches
vary from 1.8 to 2.6 x 10^22 Nm. Our study is the first to model
the static displacement field using a layered spherical Earth model,
allowing us to incorporate both near-field and far-field static displacements
in a consistent manner. The obtained seismic moment of 1.97 x 10^22
Nm, corresponding to a moment magnitude of 8.8, is similar to that
obtained by previous seismic and geodetic inversions.
@article{pollitz_etal:2011,
abstract = {Static offsets produced by the February 27, 2010 Mw = 8.8 Maule, Chile
earthquake as measured by GPS and InSAR constrain coseismic slip
along a section of the Andean megathrust of dimensions 650 km (in
length) x 180 km (in width). GPS data have been collected from both
campaign and continuous sites sampling both the near-field and far
field. ALOS/PALSAR data from several ascending and descending tracks
constrain the near-field crustal deformation. Inversions of the geodetic
data for distributed slip on the megathrust reveal a pronounced slip
maximum of order 15 m at \~{}15-25 km depth on the megathrust offshore
Lloca, indicating that seismic slip was greatest north of the epicenter
of the bilaterally propagating rupture. A secondary slip maximum
appears at depth \~{}25 km on the megathrust just west of Concepci\'{o}n.
Coseismic slip is negligible below 35 km depth. Estimates of the
seismic moment based on different datasets and modeling approaches
vary from 1.8 to 2.6 x 10^22 Nm. Our study is the first to model
the static displacement field using a layered spherical Earth model,
allowing us to incorporate both near-field and far-field static displacements
in a consistent manner. The obtained seismic moment of 1.97 x 10^22
Nm, corresponding to a moment magnitude of 8.8, is similar to that
obtained by previous seismic and geodetic inversions.},
added-at = {2012-09-01T13:08:21.000+0200},
author = {Pollitz, Fred F. and Brooks, Ben and Tong, Xiaopeng and Bevis, Michael G. and Foster, James H. and B\"{u}rgmann, Roland and Smalley, Robert and Vigny, Christophe and Socquet, Anne and Ruegg, Jean-Claude and Campos, Jaime and Barrientos, Sergio and Parra, H\'{e}ctor and Soto, Juan C. and Cimbaro, Sergio and Blanco, Mauro},
biburl = {https://www.bibsonomy.org/bibtex/2c3e013f759c7338cb13e4590c7136579/nilsma},
day = 6,
doi = {10.1029/2011GL047065},
interhash = {98c1b7db6568757f087cb9b91f8824dc},
intrahash = {c3e013f759c7338cb13e4590c7136579},
issn = {0094-8276},
journal = {Geophysical Research Letters},
keywords = {seismology},
month = may,
number = 9,
pages = {L09309+},
timestamp = {2021-02-09T13:26:05.000+0100},
title = {Coseismic slip distribution of the February 27, 2010 Mw 8.8 Maule,
Chile earthquake},
url = {http://dx.doi.org/10.1029/2011GL047065},
volume = 38,
year = 2011
}