naa a22 4500 510755119 CHVBK 20180411083119.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s12594-013-0106-7 doi (NATIONALLICENCE)springer-10.1007/s12594-013-0106-7 The M w 8.6 Indian Ocean earthquake on 11 April 2012: Coseismic displacement, Coulomb stress change and aftershocks pattern [Elektronische Daten] [Mahesh Shrivastava, C. Reddy] The M w 8.6 Indian Ocean earthquake occurred on April 11, 2012 near the NW junction of three plates viz. Indian, Australian and Sunda plate, which caused widespread coseismic displacements and Coulomb stress changes. We analyzed the GPS data from three IGS sites PBRI, NTUS & COCO and computed the coseismic horizontal displacements. In order to have in-depth understanding of the physics of earthquake processes and probabilistic hazard, we estimated the coseismic displacements and associated Coulomb stress changes from two rectangular parallel fault geometries, constrained by Global Positioning System (GPS) derived coseismic displacements. The Coulomb stress changes following the earthquake found to be in the range of 5 to −4 bar with maximum displacement of ∼11 m near the epicenter. We find that most of the aftershocks occurred in the areas of increased Coulomb stress and concentrated in three clusters. The temporal variation of the aftershocks, not conformed to modified Omori's law, speculating poroelastic processes. It is also ascertained that the spatio-temporal transient stress changes may promote the occurrence of the subsequent earthquakes and enhance the seismic risk in the region. Geological Society of India, 2013 Earthquake nationallicence Coseismic nationallicence Coulomb stress nationallicence GPS nationallicence Indian Ocean nationallicence Shrivastava Mahesh Indian Institute of Geomagnetism, 410 218, Navi Mumbai, India aut Reddy C. Indian Institute of Geomagnetism, 410 218, Navi Mumbai, India aut Journal of the Geological Society of India Springer-Verlag 81/6(2013-06-01), 813-820 0016-7622 81:6<813 2013 81 12594 https://doi.org/10.1007/s12594-013-0106-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12594-013-0106-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shrivastava Mahesh Indian Institute of Geomagnetism, 410 218, Navi Mumbai, India aut NATIONALLICENCE 700 1- Reddy C. Indian Institute of Geomagnetism, 410 218, Navi Mumbai, India aut NATIONALLICENCE 773 0- Journal of the Geological Society of India Springer-Verlag 81/6(2013-06-01), 813-820 0016-7622 81:6<813 2013 81 12594 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer