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<title lang=en>Present-day interseismic surface deformation along the Longitudinal Valley, eastern Taiwan, from a PS-InSAR analysis of the ERS satellite archives</title>
<creator>Peyret, Michel</creator>
<creator>DOMINGUEZ, Stéphane</creator>
<creator>Cattin, Rodolphe</creator>
<creator>Champenois, J.</creator>
<creator>Leroy, M.</creator>
<creator>Zajac, A.</creator>
<contributor>Risques ; Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS) - Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Géomatique, Télédétection, Modélisation des connaissances ; Université Paris-Est Marne-la-Vallée (UPEM) - Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)</contributor>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>ISSN: 0148-0227</source>
<source>EISSN: 2156-2202</source>
<source>Journal of Geophysical Research</source>
<publisher>American Geophysical Union</publisher>
<identifier>hal-00595532</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00595532</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00595532</source>
<source>Journal of Geophysical Research, American Geophysical Union, 2011, 116, pp.B03402. 〈10.1029/2010JB007898〉</source>
<identifier>DOI : 10.1029/2010JB007898</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1029/2010JB007898</relation>
<language>en</language>
<subject lang=en>Longitudinal Valley</subject>
<subject lang=en>PS-InSAR</subject>
<subject lang=en>interseismic deformation</subject>
<subject lang=en>Taiwan</subject>
<subject>[SDU.STU.TE] Sciences of the Universe [physics]/Earth Sciences/Tectonics</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>In Taiwan, about one third of the lithospheric plate convergence between Eurasia and the Philippine Sea plate is accommodated on the eastern coast across the narrow Longitudinal Valley (LV). The Longitudinal Valley Fault (LVF) is the main seismically active fault zone in this region. However, the spatial distribution of ground deformation due to interseismic loading on locked fault segments remains widely unknown. To address this problem, we use a "permanent scatterer" (PS) interferometric synthetic aperture radar (InSAR) approach for processing the ERS satellite archives. The PS mean velocity maps allow accurately mapping and quantifying the ground deformation all along the LV. Assuming that, close to the surface, the fault plane along the central LVF creeping segment dips 55 degrees to the east, we derive a slip vector at the surface of similar to 25 mm/yr with a mean rake of 70 degrees. In agreement with our PS observations, shallow seismicity indicates a clear change in the fault mechanical behavior of the creeping segment around Fuli town. Finally, we propose a combination of the PS velocity fields for estimating a 3-D map of ground deformation. In the southern part of the LV, the vertical component reveals an uplift of the Coastal Range with respect to the LV of similar to 10 mm/yr. Moreover, between Taitung and Luyeh, the vertical deformation is essentially accommodated along the Luyeh Strand. Finally, north of Rueisuei, the Coastal Range uniformly subsides at similar to 15 mm/yr relative to the western side of the LV. However, a local uplift pattern is detected around latitude 23 degrees 42'.</description>
<date>2011</date>
</dc>
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