scholarly journals Rupture Process during the Mw 8.1 2017 Chiapas Mexico Earthquake: Shallow Intraplate Normal Faulting by Slab Bending

2017 ◽  
Author(s):  
Ryo Okuwaki ◽  
Yuji Yagi
Keyword(s):  
Rupture Process ◽  
Normal Faulting ◽  
Mexico Earthquake ◽  
Slab Bending

scholarly journals Slab bending, syn-subduction normal faulting, and out-of-sequence thrusting in the Central Apennines

Tectonics ◽  
2014 ◽  
Vol 33 (4) ◽  
pp. 530-551 ◽  
Author(s):  
Eugenio Carminati ◽  
Simone Fabbi ◽  
Massimo Santantonio
Keyword(s):  
Normal Faulting ◽  
Central Apennines ◽  
Slab Bending

scholarly journals A possible stress interaction between large thrust and normal faulting earthquakes in the Mexican subduction zone

1999 ◽  
Vol 89 (6) ◽  
pp. 1418-1427 ◽  
Author(s):  
Takeshi Mikumo ◽  
Shri Krishna Singh ◽  
Miguel A. Santoyo
Keyword(s):  
High Stress ◽  
Stress Change ◽  
Vertical Shear ◽  
3D Analysis ◽  
Normal Faulting ◽  
Dynamic Rupture ◽  
Cocos Plate ◽  
Stress Changes ◽  
Subducting Plate ◽  
Mexico Earthquake

Abstract A large, nearly vertical, normal-faulting earthquake (Mw = 7.1) took place in 1997 in the subducting Cocos plate just beneath the ruptured fault zone of the 1985 Michoacan, Mexico, earthquake (Mw = 8.1). We investigate the possibility of stress interaction between the two large events through a 3D analysis of coseismic-stress change that was due to the first event, taking into consideration the postseismic change and the dynamic rupture process of the second event. In the middle portion of the subducting plate at depths below 30 km, the calculated coseismic increase in the vertical-shear stress and in the Coulomb-failure stress beneath the high stress-drop zones of the 1985 earthquake is in the order of 0.4 to 0.8 MPa. It was also found that the 1997 earthquake took place in the zone of maximum coseismic-stress increase. Possible postseismic-stress changes due to the subduction process or to the loading of the overriding continental lithosphere and from aseismic slip would enhance the coseismic-stress change and hence the possibility of occurrence of a normal-faulting earthquake in the subducting plate. The dynamic rupture pattern of the 1997 event seems to be consistent with the inferred stress interactions.

Source Characteristics of the 2020 Mw 7.4 Oaxaca, Mexico, Earthquake Estimated from GPS, InSAR, and Teleseismic Waveforms

2021 ◽  
Author(s):  
Yangmao Wen ◽  
Zhuohui Xiao ◽  
Ping He ◽  
Jianfei Zang ◽  
Yang Liu ◽  
...  
Keyword(s):  
Near Field ◽  
Rupture Process ◽  
High Rate ◽  
Coseismic Deformation ◽  
Interferometric Synthetic Aperture Radar ◽  
Key Factors ◽  
Factors Affecting ◽  
Initial Rupture ◽  
Mexico Earthquake ◽  
Nonlinear Joint

Abstract On 23 June 2020, an Mw 7.4 earthquake struck offshore Oaxaca, Mexico, providing a unique opportunity to understand the seismogenic tectonics of the Mexican subduction zone. In this study, near-field coseismic deformation caused by the event was retrieved from Global Positioning System (GPS) observations and Interferometric Synthetic Aperture Radar (InSAR) measurements. Given static geodetic measurements, high-rate GPS waveforms, and teleseismic waveforms, the fault geometry and rupture process for the 2020 Oaxaca earthquake were robustly determined by nonlinear joint inversions. The main slip was located at a depth of 20–30 km with a peak slip of 3.4 m near the epicenter. The total released moment was 1.70×1020  N·m, corresponding to Mw 7.4. The whole rupture process lasted 14 s, with the dominant rupture slip occurring 5–8 s after initial rupture. The mainshock rupture mostly occurred along the fault strike, covering a size of ∼55  km(along strike)×∼35  km(along dip) and totally overlapping with the 1965 Mw 7.5 rupture zone. We speculate that this 2020 earthquake is a repeat event following that in 1965. Fluid percolation under the slab may be one of the key factors affecting the seismogenic depth in the Oaxaca region.

scholarly journals The 1995 Colima-Jalisco, Mexico, Earthquake (Mw 8): A study of the rupture process

1997 ◽  
Vol 24 (9) ◽  
pp. 1019-1022 ◽  
Author(s):  
Françoise Courboulex ◽  
Shri K. Singh ◽  
Javier F. Pacheco ◽  
Charles J. Ammon
Keyword(s):  
Rupture Process ◽  
Mexico Earthquake

The Oaxaca, Mexico, earthquake of 1931: lithospheric normal faulting in the subducted Cocos plate

Nature ◽  
1985 ◽  
Vol 317 (6032) ◽  
pp. 56-58 ◽  
Author(s):  
S. K. Singh ◽  
Gerardo Suárez ◽  
T. Domínguez
Keyword(s):  
Normal Faulting ◽  
Cocos Plate ◽  
Mexico Earthquake

Deadly Mexico earthquake had unusual cause

Nature ◽  
2017 ◽  
Author(s):  
Emiliano Rodríguez Mega
Keyword(s):  
Mexico Earthquake
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