TY  - JOUR
A1  - Jara, Jorge
A1  - Sanchez-Reyes, Hugo
A1  - Socquet, Anne
A1  - Cotton, Fabrice Pierre
A1  - Virieux, Jean
A1  - Maksymowicz, Andrei
A1  - Diaz-Mojica, John
A1  - Walpersdorf, Andrea
A1  - Ruiz, Javier
A1  - Cotte, Nathalie
A1  - Norabuena, Edmundo
T1  - Kinematic study of Iquique 2014 M-w 8.1 earthquake
BT  - Understanding the segmentation of the seismogenic zone
JF  - Earth & planetary science letters
N2  - We study the rupture processes of Iquique earthquake M-w 8.1 (2014/04/01) and its largest aftershock M-w 7.7 (2014/04/03) that ruptured the North Chile subduction zone. High-rate Global Positioning System (GPS) recordings and strong motion data are used to reconstruct the evolution of the slip amplitude, rise time and rupture time of both earthquakes. A two-step inversion scheme is assumed, by first building prior models for both earthquakes from the inversion of the estimated static displacements and then, kinematic inversions in the frequency domain are carried out taken into account this prior information. The preferred model for the mainshock exhibits a seismic moment of 1.73 x 10(21) Nm (M-w 8.1) and maximum slip of similar to 9 m, while the aftershock model has a seismic moment of 3.88 x 10(20) (M-w 7.7) and a maximum slip of similar to 3 m. For both earthquakes, the final slip distributions show two asperities (a shallow one and a deep one) separated by an area with significant slip deficit. This suggests a segmentation along-dip which might be related to a change of the dipping angle of the subducting slab inferred from gravimetric data. Along-strike, the areas where the seismic ruptures stopped seem to be well correlated with geological features observed from geophysical information (high-resolution bathymetry, gravimetry and coupling maps) that are representative of the long-term segmentation of the subduction margin. Considering the spatially limited portions that were broken by these two earthquakes, our results support the idea that the seismic gap is not filled yet. (C) 2018 Elsevier B.V. All rights reserved.
KW  - high-rate GPS
KW  - strong Motion
KW  - megathrust earthquakes
KW  - kinematic inversion
KW  - subduction segmentation
Y1  - 2018
U6  - https://doi.org/10.1016/j.epsl.2018.09.025
SN  - 0012-821X
SN  - 1385-013X
VL  - 503
SP  - 131
EP  - 143
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - GEN
A1  - Jara, Jorge
A1  - Sánchez-Reyes, Hugo
A1  - Socquet, Anne
A1  - Cotton, Fabrice Pierre
A1  - Virieux, Jean
A1  - Maksymowicz, Andrei
A1  - Díaz-Mojica, John
A1  - Walpersdorf, Andrea
A1  - Ruiz, Javier
A1  - Cotte, Nathalie
A1  - Norabuena, Edmundo
T1  - Corrigendum to: Kinematic study of Iquique 2014 Mw 8.1 earthquake: Understanding the segmentation of the seismogenic zone. - (Earth and planetary science letters. - 503 (2018) S. 131 – 143)
T2  - Earth and planetary science letters
N2  - We study the rupture processes of Iquique earthquake 8.1 (2014/04/01) and its largest aftershock 7.7 (2014/04/03) that ruptured the North Chile subduction zone. High-rate Global Positioning System (GPS) recordings and strong motion data are used to reconstruct the evolution of the slip amplitude, rise time and rupture time of both earthquakes. A two-step inversion scheme is assumed, by first building prior models for both earthquakes from the inversion of the estimated static displacements and then, kinematic inversions in the frequency domain are carried out taken into account this prior information. The preferred model for the mainshock exhibits a seismic moment of 1.73 × 1021 Nm ( 8.1) and maximum slip of ∼9 m, while the aftershock model has a seismic moment of 3.88 × 1020 ( 7.7) and a maximum slip of ∼3 m. For both earthquakes, the final slip distributions show two asperities (a shallow one and a deep one) separated by an area with significant slip deficit. This suggests a segmentation along-dip which might be related to a change of the dipping angle of the subducting slab inferred from gravimetric data. Along-strike, the areas where the seismic ruptures stopped seem to be well correlated with geological features observed from geophysical information (high-resolution bathymetry, gravimetry and coupling maps) that are representative of the long-term segmentation of the subduction margin. Considering the spatially limited portions that were broken by these two earthquakes, our results support the idea that the seismic gap is not filled yet.
Y1  - 2018
U6  - https://doi.org/10.1016/j.epsl.2018.11.026
SN  - 0012-821X
SN  - 1385-013X
VL  - 506
SP  - 347
EP  - 347
PB  - Elsevier
CY  - Amsterdam
ER  -