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  • 1
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    Determining the Sula block kinematics in the triple junction area in Indonesia by Global Positioning System (1998)
    In:  Geophys. J. Int., Washington, D.C., AGU, vol. 135, no. 2, pp. 351-361, pp. B12406, (ISSN: 1340-4202)
    Details
    Publication Date: 1998
    Keywords: Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Geodesy ; Plate tectonics ; GJI
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    5 years of Global Positioning System observations of the Afar triple junction area (1999)
    In:  J. of Geodynamics, Washington, D.C., AGU, vol. 28, no. 2-3, pp. 225-236, pp. B12406, (ISSN: 1340-4202)
    Details
    Publication Date: 1999
    Keywords: Plate tectonics ; Geodesy ; Crustal deformation (cf. Earthquake precursor: deformation or strain)
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Insight into the 2004 Sumatra-Andaman earthquake from Global Positioning System measurements in southeast Asia (2005)
    In:  Nature, Veldhoven, Kluwer, vol. 436, no. 7048, pp. 201-206, pp. B05312, (ISSN: 1340-4202)
    Details
    Publication Date: 2005
    Keywords: Earthquake ; Tsunami(s) ; Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Source parameters ; FROTH
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    BIBLIOGRAPHY SEISMOLOGY
  • 4
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    On the origin of deviatoric stresses in the lithosphere (1992)
    In:  J. Geophys. Res., Reykjavík, Icelandic Meteorological Office, Ministry for the Environment, University of Iceland, vol. 97, no. 1, pp. 11729-11737, pp. L05306, (ISSN: 1340-4202)
    Details
    Publication Date: 1992
    Keywords: Stress ; Modelling ; Finite Element Method ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 5
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    3D displacement field of the 2015 Mw8.3 Illapel earthquake (Chile) from across- and along-track Sentinel-1 TOPS interferometry (2016)
    Wiley
    Details
    Publication Date: 2016-03-07
    Description: Wide-swath imaging has become a standard acquisition mode for radar missions aiming at applying SAR interferometry at global scale with enhanced revisit frequency. Increased swath width, compared to classical Stripmap imaging mode, is achieved at the expense of azimuthal resolution. This makes along-track displacements, and subsequently north-south displacements, difficult to measure using conventional split-beam (multiple-aperture) InSAR or cross-correlation techniques. Alternatively, we show here that the along-track component of ground motion can be deduced from the double-difference between backward- and forward-looking interferograms within regions of burst overlap. “Burst overlap interferometry” takes advantage of the large squint angle diversity of Sentinel-1 (∼1°) to achieve sub-decimetric accuracy on the along-track component of ground motion. We demonstrate the efficiency of this method using Sentinel-1 data covering the 2015 M w 8.3 Illapel earthquake (Chile) for which we retrieve the full 3D displacement field and validate it against observations from a dense network of GPS sensors.
    Print ISSN: 0094-8276
    Electronic ISSN: 1944-8007
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 6
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    Interseismic coupling, segmentation and mechanical behavior of the central Chile subduction zone (2012)
    Wiley
    Details
    Publication Date: 2012-03-14
    Description: Global Positioning System (GPS) measurements carried out in Chile over the last two decades showed that an entire portion of the Nazca-South America subduction zone (38°S − 24°S) was locked over this period of time. The induced accumulation of elastic deformation in the upper-plate was not released until the recent Maule earthquake of 27 February 2010 (Mw 8.8) that ruptured the southern part of this section. Locking or coupling between the two plates varies both with depth and along strike. Here we use our own GPS data (an updated solution of our extended network in central Chile), combined with other published data sets, to quantify the spatial variations of the coupling that prevailed before the Maule earthquake. Using a simple elastic model based on the back-slip assumption, we show that coupling variations on the subduction plane are sufficient to explain the observed surface deformation, with no need of a sliver in central Chile. We identify four segments characterized by higher coupling and separated by narrow areas of lower coupling. This segmentation is in good agreement with historical and recent seismicity in Chile. In particular the narrow zones of lower coupling seem to have stopped most large seismic ruptures, including Maule's. These zones are often associated with irregular bathymetric or coastal features (fracture zones or peninsulas). Finally, coseismic and early post-seismic slip distribution of the Maule earthquake, occurring either in previously highly or weakly coupled zones, map a complex distribution of velocity-weakening and velocity-strengthening patches on the subduction interface.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 7
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    The 2010 Mw 8.8 Maule megathrust earthquake of Central Chile, monitored by GPS (2011)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2011-04-30
    Description: Large earthquakes produce crustal deformation that can be quantified by geodetic measurements, allowing for the determination of the slip distribution on the fault. We used data from Global Positioning System (GPS) networks in Central Chile to infer the static deformation and the kinematics of the 2010 moment magnitude (M(w)) 8.8 Maule megathrust earthquake. From elastic modeling, we found a total rupture length of ~500 kilometers where slip (up to 15 meters) concentrated on two main asperities situated on both sides of the epicenter. We found that rupture reached shallow depths, probably extending up to the trench. Resolvable afterslip occurred in regions of low coseismic slip. The low-frequency hypocenter is relocated 40 kilometers southwest of initial estimates. Rupture propagated bilaterally at about 3.1 kilometers per second, with possible but not fully resolved velocity variations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vigny, C -- Socquet, A -- Peyrat, S -- Ruegg, J-C -- Metois, M -- Madariaga, R -- Morvan, S -- Lancieri, M -- Lacassin, R -- Campos, J -- Carrizo, D -- Bejar-Pizarro, M -- Barrientos, S -- Armijo, R -- Aranda, C -- Valderas-Bermejo, M-C -- Ortega, I -- Bondoux, F -- Baize, S -- Lyon-Caen, H -- Pavez, A -- Vilotte, J P -- Bevis, M -- Brooks, B -- Smalley, R -- Parra, H -- Baez, J-C -- Blanco, M -- Cimbaro, S -- Kendrick, E -- New York, N.Y. -- Science. 2011 Jun 17;332(6036):1417-21. doi: 10.1126/science.1204132. Epub 2011 Apr 28.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire de Geologie de l'Ecole Normale Superieure, UMR CNRS 8538, Paris, France. vigny@biotite.ens.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21527673" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 8
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    Intense foreshocks and a slow slip event preceded the 2014 Iquique Mw 8.1 earthquake (2014)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2014-07-26
    Description: The subduction zone in northern Chile is a well-identified seismic gap that last ruptured in 1877. The moment magnitude (Mw) 8.1 Iquique earthquake of 1 April 2014 broke a highly coupled portion of this gap. To understand the seismicity preceding this event, we studied the location and mechanisms of the foreshocks and computed Global Positioning System (GPS) time series at stations located on shore. Seismicity off the coast of Iquique started to increase in January 2014. After 16 March, several Mw 〉 6 events occurred near the low-coupled zone. These events migrated northward for ~50 kilometers until the 1 April earthquake occurred. On 16 March, on-shore continuous GPS stations detected a westward motion that we model as a slow slip event situated in the same area where the mainshock occurred.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ruiz, S -- Metois, M -- Fuenzalida, A -- Ruiz, J -- Leyton, F -- Grandin, R -- Vigny, C -- Madariaga, R -- Campos, J -- New York, N.Y. -- Science. 2014 Sep 5;345(6201):1165-9. doi: 10.1126/science.1256074. Epub 2014 Jul 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Departamento de Geofisica, Facultad de Ciencias Fisicas y Matematicas, Universidad de Chile, Santiago, Chile. sruiz@dgf.uchile.cl. ; Istituto Nazionale di Geofisica e Vulcanologia, Centro Nazionale Terremoti, Rome, Italy. ; School of Environmental Sciences, University of Liverpool, Liverpool, UK. ; Departamento de Geofisica, Facultad de Ciencias Fisicas y Matematicas, Universidad de Chile, Santiago, Chile. ; Centro Sismologico Nacional, Facultad de Ciencias Fisicas y Matematicas, Universidad de Chile, Santiago, Chile. ; Institut de Physique du Globe de Paris, Sorbonne Paris Cite, Universite Paris Diderot, UMR 7154 CNRS, Paris, France. ; Laboratoire de Geologie, UMR 8538 CNRS Ecole Normale Superieure, Paris, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25061132" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 9
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    April 2012 intra-oceanic seismicity off Sumatra boosted by the Banda-Aceh megathrust (2012)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2012-10-02
    Description: Large earthquakes nucleate at tectonic plate boundaries, and their occurrence within a plate's interior remains rare and poorly documented, especially offshore. The two large earthquakes that struck the northeastern Indian Ocean on 11 April 2012 are an exception: they are the largest strike-slip events reported in historical times and triggered large aftershocks worldwide. Yet they occurred within an intra-oceanic setting along the fossil fabric of the extinct Wharton basin, rather than on a discrete plate boundary. Here we show that the 11 April 2012 twin earthquakes are part of a continuing boost of the intraplate deformation between India and Australia that followed the Aceh 2004 and Nias 2005 megathrust earthquakes, subsequent to a stress transfer process recognized at other subduction zones. Using Coulomb stress change calculations, we show that the coseismic slips of the Aceh and Nias earthquakes can promote oceanic left-lateral strike-slip earthquakes on pre-existing meridian-aligned fault planes. We further show that persistent viscous relaxation in the asthenospheric mantle several years after the Aceh megathrust explains the time lag between the 2004 megathrust and the 2012 intraplate events. On a short timescale, the 2012 events provide new evidence for the interplay between megathrusts at the subduction interface and intraplate deformation offshore. On a longer geological timescale, the Australian plate, driven by slab-pull forces at the Sunda trench, is detaching from the Indian plate, which is subjected to resisting forces at the Himalayan front.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Delescluse, Matthias -- Chamot-Rooke, Nicolas -- Cattin, Rodolphe -- Fleitout, Luce -- Trubienko, Olga -- Vigny, Christophe -- England -- Nature. 2012 Oct 11;490(7419):240-4. doi: 10.1038/nature11520. Epub 2012 Sep 26.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire de Geologie, Ecole Normale Superieure and CNRS UMR8538, 75005 Paris, France. delescluse@geologie.ens.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23023134" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 10
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    Geophysics. Central Chile finally breaks (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-04-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Madariaga, Raul -- Metois, Marianne -- Vigny, Christophe -- Campos, Jaime -- New York, N.Y. -- Science. 2010 Apr 9;328(5975):181-2. doi: 10.1126/science.1189197.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire de Geologie et LIA Montessus de Ballore, CNRS and Ecole Normale Superieure, 75231 Paris Cedex 05, France. madariag@geologie.ens.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20378806" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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