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The role of rheological heterogeneities in postseismic deformation
2022<p>Advances in modelling and access to InSAR and GNSS observations have highlighted the role that rheological heterogeneities play in postseismic deformation. Here we discuss three recent studies (Muto et al. 2019, Sambuddha et al. 2022, and Takada et al.
James Moore +4 more
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Postseismic deformation after 2008 Wenchuan Earthquake
Survey Review, 2014AbstractApparent postseismic deformation was observed after the 2008 Wenchuan earthquake, China. The displacement in the direction normal to the fault decays to nearly zero after 2013, but the significant dextral movement did not decay obviously during our observation of up to May 2013.
C. J. Xu +4 more
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Postseismic Deformation Monitoring With the COSMO/SKYMED Constellation
IEEE Geoscience and Remote Sensing Letters, 2011COSMO/SKYMED is currently the unique constellation of synthetic aperture radar (SAR) sensors operative, which is also for civilian use. On April 6, 2009, an Mw 6.3 earthquake struck the city of I'Aquila in Central Italy. The constellation acquired data stacks over the hit area at an unprecedented temporal rate.
Diego Reale +5 more
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Vertical Postseismic Deformation of the 2019 Ridgecrest Earthquake Sequence
Journal of Geophysical Research: Solid Earth, 2022AbstractThe 2019 Ridgecrest conjugate Mw6.4 and Mw7.1 events resulted in several meters of strike‐slip and dip‐slip along an intricate rupture, extending from the surface down to 15 km. Now with >2 years of post‐rupture observations, we utilize these results to better understand vertical postseismic deformation from the Ridgecrest sequence and ...
Lauren A. Ward +5 more
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Global postseismic deformation: Deep earthquakes
Journal of Geophysical Research: Solid Earth, 2000We study the global viscoelastic deformations associated with a shear dislocation on a fault embedded in a viscoelastic mantle. To address this problem, we extend the theory of the quasi‐static deformations of a Maxwell, spherical, N‐layer incompressible Earth, previously limited to the modeling of the effects of earthquakes occurring only within the ...
L. Boschi, A. Piersanti, SPADA, GIORGIO
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Interpretation of postseismic deformation with a viscoelastic relaxation model
Journal of Geophysical Research: Solid Earth, 1980Aleutian tide gages registered coseismic subsidence of 10–15 cm at three locations during the great earthquakes of 1957 and 1965. For approximately 5–6 years after this initial subsidence the data indicate postseismic uplift of the islands to approximately their initial level.
J. Wahr, M. Wyss
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A plate flexure approximation to postseismic and interseismic deformation
Journal of Geophysical Research: Solid Earth, 1985The rather large postseismic deformation that is associated with two‐dimensional dip‐slip faulting in the lithosphere is related to the bending of a free plate generated by dip‐slip faulting. In the absence of gravity, asthenosphere relaxation eventually permits the faulted lithosphere to assume the dihedral configuration of a faulted free plate.
J. C. Savage, Guohua Gu
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Izmit earthquake postseismic deformation and dynamics of the North Anatolian Fault Zone [PDF]
Journal of Geophysical Research, 2009 We have modeled postseismic deformation from 1999 to 2003 in the region surrounding the 1999 Izmit and Düzce earthquake ruptures, using a three‐dimensional viscoelastic finite element method. Our models confirm earlier findings that surface deformation within the first few months of the Izmit earthquake is principally due to stable frictional afterslip
Semih Ergintav, Simon McClusky
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A viscoelastic and afterslip postseismic deformation model for the 1964 Alaska earthquake [PDF]
Journal of Geophysical Research, 2009 We developed a 3‐D viscoelastic model, in concert with an afterslip model, to describe the postseismic deformation following the 1964 Alaska earthquake. Our model incorporates a realistic geometry including an elastic slab with very low dip angle. These geometric factors are important and require a reanalysis of the 1964 coseismic model.
Jeffrey Freymueller, Hisashi Suito
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Spherical versus flat models of coseismic and postseismic deformations
Journal of Geophysical Research: Solid Earth, 1999We perform an exhaustive study of coseismic and postseismic surface deformations induced by shear dislocations using flat and spherical Earth models. Our aim is to examine the effects of the spherical geometry, the vertical layering, and the self‐gravitation on surface displacement field.
C. Nostro +3 more
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