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<title lang=en>Recovering paleoearthquake slip record in a highly dynamic alluvial and tectonic region (Hope Fault, New Zealand) from airborne lidar</title>
<creator>Manighetti, I.</creator>
<creator>Perrin, C.</creator>
<creator>Dominguez, S</creator>
<creator>Garambois, S</creator>
<creator>Gaudemer, Y.</creator>
<creator>Malavieille, J.</creator>
<creator>Matteo, L.</creator>
<creator>Delor, E.</creator>
<creator>Vitard, C.</creator>
<creator>Beauprêtre, S</creator>
<contributor>Géoazur (GEOAZUR) ; Université Côte d'Azur (UCA) - Centre National de la Recherche Scientifique (CNRS) - Observatoire de la Côte d'Azur - Institut national des sciences de l'Univers (INSU - CNRS) - Université Nice Sophia Antipolis (UNS) ; Université Côte d'Azur (UCA)</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>
<contributor>Institut des Sciences de la Terre (ISTerre) ; Université Joseph Fourier - Grenoble 1 (UJF) - Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR) - Institut national des sciences de l'Univers (INSU - CNRS) - Institut de recherche pour le développement [IRD] : UR219 - PRES Université de Grenoble - Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Institut de Physique du Globe de Paris (IPGP) ; Institut national des sciences de l'Univers (INSU - CNRS) - IPG PARIS - Université Paris Diderot - Paris 7 (UPD7) - Université de la Réunion (UR) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>ISSN: 2169-9313</source>
<source>EISSN: 2169-9356</source>
<source>Journal of Geophysical Research : Solid Earth</source>
<publisher>American Geophysical Union</publisher>
<identifier>insu-01469219</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-01469219</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-01469219/document</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-01469219/file/Manighetti_et_al-2015-Journalsur Geophysical_Research__Solid_Earth.pdf</identifier>
<source>https://hal-insu.archives-ouvertes.fr/insu-01469219</source>
<source>Journal of Geophysical Research : Solid Earth, American Geophysical Union, 2015, 120 (6), pp.4484-4509. 〈10.1002/2014JB011787〉</source>
<identifier>DOI : 10.1002/2014JB011787</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1002/2014JB011787</relation>
<language>en</language>
<subject lang=en>paleoseismology, lidar, morphology, strike-slip fault, alluvial dynamics</subject>
<subject>[SDU.STU.TE] Sciences of the Universe [physics]/Earth Sciences/Tectonics</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Knowing the slip amplitudes that large earthquakes produced in prehistorical times is one key to anticipate the magnitude of large forthcoming events. It is long known that the morphology is preserving remnants of paleoearthquake slips in the form of fault-offset landforms. However, the measured offsets that can be attributed to the most recent paleoearthquakes are generally few along a fault, so that they rarely allow recovering the slip distributions and largest slips of these earthquakes. We acquired ~1 m resolution airborne lidar data on a 30 km stretch of a fast-slipping strike-slip fault (eastern Hope Fault, New Zealand) located in a region of high alluvial dynamics where landforms are rapidly evolving. Data analysis reveals >200 offset landforms; only 30% allow a good to moderate quality offset measurement. From these good to moderate quality measures, we recover the slip-length distributions and largest slips of the four most recent large paleoearthquakes and find evidence of 4–6 prior events. The record suggests that large earthquake slip recurred in multiples of about 4 m along the 30 km stretch. Although they have larger uncertainties, the more numerous lower-quality offsets that we also measured reveal a similar earthquake slip record. This shows that, although offset landforms are partly degraded in dynamically active landscapes, they store valuable information on paleoearthquake slips. This information might be recovered provided that the morphology is analyzed at high resolution and " continuously " over a significant fault length. Remote lidar data are powerful to perform such analyses.</description>
<date>2015</date>
</dc>
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