FN Archimer Export Format PT J TI 26th December 2004 great Sumatra-Andaman earthquake: Co-seismic and post-seismic motions in northern Sumatra BT AF SIBUET, Jean-Claude RANGIN, C LE PICHON, X SINGH, S CATTANEO, Antonio GRAINDORGE, D KLINGELHOEFER, Frauke LIN, Jing-Yi MALOD, Jacques-Andre MAURY, Tanguy SCHNEIDER, J SULTAN, Nabil UMBER, Marie YAMAGUCHI, H AS 1:1;2:2;3:2;4:3;5:1;6:1;7:1;8:1;9:1,4;10:1;11:1;12:1;13:1;14:5; FF 1:PDG-DOP-DCB-GM-LGG;2:;3:;4:;5:PDG-DOP-DCB-GM-LES;6:;7:PDG-DOP-DCB-GM-LGG;8:PDG-DOP-DCB-GM-LGG;9:;10:PDG-DOP-DCB-GM-LGG;11:;12:PDG-DOP-DCB-GM-LES;13:PDG-DOP-DCB-GM-LGG;14:; C1 Ifremer Centre de Brest, B.P. 70, 29280 Plouzané cedex, France Collège de France, Chaire de Géodynamique and CNRS CEREGE, Europôle de l'Arbois, BP 80, 13545 Aix en Provence, France Institut de Physique du Globe de Paris, 4 Place Jussieu, Tour 14-15, 5th Floor, 75252 Paris cedex 05, France Institut Universitaire Européen de la Mer, Place Nicolas Copernic, 29280 Plouzané, France Institute for Research on Earth's Evolution, Japan Agency for Marine-Earth Science and Technology, Natsushima-cho 2-15, Yokosuka, 237-0061, Japan et Océanographie, Avenue des Facultés, 33405 Talence cedex, France Université Bordeaux 1, Observatoire Aquitain des Sciences de l'Univers, Département de Géologie et Océanographie, Avenue des Facultés, 33405 Talence cedex, France C2 IFREMER, FRANCE COLL FRANCE, FRANCE IPGP, FRANCE UBO, FRANCE IFREE, JAPAN UNIV BORDEAUX, FRANCE SI BREST SE PDG-DOP-DCB-GM-LGG PDG-DOP-DCB-GM-LES PDG-DOP-DCB-GM IN WOS Ifremer jusqu'en 2018 copubli-france copubli-univ-france copubli-int-hors-europe IF 3.873 TC 78 UR https://archimer.ifremer.fr/doc/2007/publication-3508.pdf LA English DT Article CR MD149 / SUMATRA AFTERSHOCKS BO Marion Dufresne DE ;Active thrust faults;Co seismic rupture;Aftershocks;2004 Sumatra Andaman earthquake AB Trench-parallel thrust faults verging both landward and seaward were mapped in the portion of wedge located between northern Sumatra and the Indian-Indonesian boundary. The spatial aftershocks distribution of the 26th December 2004 earthquake shows that the post-seismic motion is partitioned along two thrust faults, the Lower and Median Thrust Faults, the latter being right-laterally offset by a N-S lower plate fracture zone located along the 93.6 degrees N meridian. Between February 2005 and August 2005, the upper plate aftershock activity shifted from southeast of this fracture zone to northwest of it, suggesting that the lower plate left-lateral motion along the fracture zone may have induced a shift of the upper plate post-seismic activity along the Median Thrust Fault. Based on swath bathymetric and 3.5 kHz data, co-seismic deformations were weak close to the trench. Joint seismic-geodetic determination of slip distribution and time arrivals and heights of tsunami waves suggest that the co-seismic slip was maximum along a portion of the Upper Thrust Fault located north of the Tuba Ridge, suggesting that the Upper Thrust Fault might be a splay fault originated at the interplate fault plane. As the Upper Thrust Fault is steeper than the slab, the vertical motion of the adjacent Outer Arc and overlying water is much larger compared to the one resulting from slip on the megathrust alone, increasing tsunamogenic effects. PY 2007 PD NOV SO Earth and Planetary Science Letters SN 0012-821X PU Elsevier VL 263 IS 1-2 UT 000251479200007 BP 88 EP 103 DI 10.1016/j.epsl.2007.09.005 ID 3508 ER EF