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2019 IMEKO TC-19 INTERNATIONAL WORKSHOP ON
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METROLOGY FOR THE SEA
GENOVA, ITALY, 3 - 5 OCTOBER 2019
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Submarine earthquake geology: mapping and quantifying a surface rupture

Leclerc



Frédérique Leclerc

Université de Nice Sophia Antipolis, France


SPEAKER BIO

Since 2016, i am Assistant Professor at Université Nice Sophia Antipolis in the laboratory of Géoazur (CNRS, IRD, OCA). My research focuses on the characterization of the tectonic deformation of the Earth’s crust in the vicinity of converging plate boundaries. These plate boundaries produce the largest earthquakes and tsunamis, and promote vertical deformation of the crust (uplift or subsidence) that can increase the actual relative sea level rise in these areas that host more than 500 millions of people. Identifying and quantifying the tectonic deformation is therefore important and impose to look for geological markers both onland and offshore.

I started working offshore during my PhD thesis at Institut de Physique du Globe de Paris, and then during a 2 year postdoctorate at the Earth Observatory of Singapour. My work focused on the recent tectonic deformation of the Lesser Antilles arc, in the Caribbean, and of Eastern Indonesia. Markers of the deformation as faults or reefs were investigated offshore thanks to marine geophysical data including seismic reflection, bathymetry and back-scatter imagery.

Recently, I was part of the SUBSAINTES cruise (PI: J. Escartin, subsaintes2017.weebly.com), during which we investigated a normal fault that broke into a Mw6.3 earthquake in 2004, followed by a tsunami. With the ROV Victor (IFREMER) we were able to image the surface rupture of the submarine earthquake along >20 km, at a depth of 1200 m. Photogrammetry techniques applied to the ROV videos (technique developed in the framework of ANR Sersurf project) allowed us to reconstruct in 3D the seafloor, map and measure the surface rupture at an unprecedented resolution of a few mm.



With the Patronage of

marina
comune genova
unige
unisannio
GdyniaUniv
cnr
inrim
conisma
ispra
arpal
iahr
gnrac
lega_navale
propellergenova
szn
gmee
atena
IHS
gmee
gmmt
feyla



In collaboration With

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