FN Archimer Export Format
PT J
TI The 2010 Haiti earthquake: A complex fault pattern constrained by seismologic and tectonic observations
BT 
AF DE LEPINAY, Bernard Mercier
   DESCHAMPS, Anne
   KLINGELHOEFER, Frauke
   MAZABRAUD, Yves
   DELOUIS, Bertrand
   CLOUARD, Valerie
   HELLO, Yann
   CROZON, Jacques
   MARCAILLOU, Boris
   GRAINDORGE, David
   VALLEE, Martin
   PERROT, Julie
   BOUIN, Marie-Paule
   SAUREL, Jean-Marie
   CHARVIS, Philippe
   ST-LOUIS, Mildor
AS 1:1;2:1;3:2;4:3;5:1;6:4;7:1;8:2;9:3;10:5;11:1;12:5;13:6;14:4;15:1;16:7;
FF 1:;2:;3:PDG-REM-GM-LGG;4:;5:;6:;7:;8:PDG-REM-GM-CTD;9:;10:;11:;12:;13:;14:;15:;16:;
C1 Univ Nice, CNRS, IRD, F-06560 Valbonne, France.
   IFREMER, F-29280 Plouzane, France.
   Univ Antilles Guyane, IUFM Guadeloupe, Pointe A Pitre 97159, Guadeloupe.
   Inst Phys Globe, Observ Volcanol & Sismol Martin, Fonds St Denis 97250, Martinique.
   Univ Bretagne Occidentale, IUEM, F-29280 Plouzane, France.
   Inst Phys Globe, Observ Volcanol & Sismol Guadeloupe, Gourbeyre 97113, Guadeloupe.
   Bur Mines & Energie, Port Au Prince, Haiti.
C2 UNIV NICE, FRANCE
   IFREMER, FRANCE
   UNIV ANTILLES GUYANE, FRANCE
   IPG MARTINIQUE, FRANCE
   UBO, FRANCE
   IPG, FRANCE
   BUR MINES & ENERGIE, HAITI
SI BREST
SE PDG-REM-GM-LGG
   PDG-REM-GM-CTD
   UBO
   IUEM
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 3.792
TC 39
UR https://archimer.ifremer.fr/doc/00054/16557/14071.pdf
LA English
DT Article
CR HAITI_OBS
BO L'Atalante
AB After the January 12, 2010, Haiti earthquake, we deployed a mainly offshore temporary network of seismologic stations around the damaged area. The distribution of the recorded aftershocks, together with morphotectonic observations and mainshock analysis, allow us to constrain a complex fault pattern in the area. Almost all of the aftershocks have a N-S compressive mechanism, and not the expected left-lateral strike-slip mechanism. A first-order slip model of the mainshock shows a N264 degrees E north-dipping plane, with a major left-lateral component and a strong reverse component. As the aftershock distribution is sub-parallel and close to the Enriquillo fault, we assume that although the cause of the catastrophe was not a rupture along the Enriquillo fault, this fault had an important role as a mechanical boundary. The azimuth of the focal planes of the aftershocks are parallel to the north-dipping faults of the Transhaitian Belt, which suggests a triggering of failure on these discontinuities. In the western part, the aftershock distribution reflects the triggering of slip on similar faults, and/or, alternatively, of the south-dipping faults, such the Trois-Baies submarine fault. These observations are in agreement with a model of an oblique collision of an indenter of the oceanic crust of the Southern Peninsula and the sedimentary wedge of the Transhaitian Belt: the rupture occurred on a wrench fault at the rheologic boundary on top of the under-thrusting rigid oceanic block, whereas the aftershocks were the result of the relaxation on the hanging wall along pre-existing discontinuities in the frontal part of the Transhaitian Belt. Citation: Mercier de Lepinay, B., et al. (2011), The 2010 Haiti earthquake: A complex fault pattern constrained by seismologic and tectonic observations, Geophys. Res. Lett., 38, L22305, doi:10.1029/2011GL049799.
PY 2011
PD NOV
SO Geophysical Research Letters
SN 0094-8276
PU Amer Geophysical Union
VL 38
IS L22305
UT 000297258500007
DI 10.1029/2011GL049799
ID 16557
ER

EF