scholarly journals Alaska megathrust 1: Seismicity 43 years after the great 1964 Alaska megathrust earthquake

2013 ◽  
Vol 118 (9) ◽  
pp. 4861-4871 ◽  
Author(s):  
Jiyao Li ◽  
Geoffrey A. Abers ◽  
YoungHee Kim ◽  
Douglas Christensen
Keyword(s):  
Megathrust Earthquake ◽  
1964 Alaska

Rapid resetting of an estuarine recorder of the 1964 Alaska earthquake

2001 ◽  
Vol 113 (9) ◽  
pp. 1193-1204 ◽  
Author(s):  
Brian F. Atwater ◽  
David K. Yamaguchi ◽  
Stein Bondevik ◽  
Walter A. Barnhardt ◽  
Lorin J. Amidon ◽  
...  
Keyword(s):  
1964 Alaska ◽  
Alaska Earthquake

scholarly journals Energetic Rupture and Tsunamigenesis during the 2020 Mw 7.4 La Crucecita, Mexico Earthquake

2020 ◽  
Vol 92 (1) ◽  
pp. 140-150
Author(s):  
Diego Melgar ◽  
Angel Ruiz-Angulo ◽  
Xyoli Pérez-Campos ◽  
Brendan W. Crowell ◽  
Xiaohua Xu ◽  
...  
Keyword(s):  
Tide Gauge ◽  
Ground Motions ◽  
Edge Wave ◽  
Megathrust Earthquake ◽  
Moment Ratio ◽  
Gulf Of Tehuantepec ◽  
Mexico Earthquake ◽  
Wave Modes

Abstract The La Crucecita earthquake ruptured on the megathrust, generating strong shaking and a modest but long-lived tsunami. This is a significant earthquake that illuminates important aspects of the behavior of the megathrust as well as the potential related hazards. The rupture is contained within 15–30 km depth, ground motions are elevated, and the energy to moment ratio is high. We argue that it represents a deep megathrust earthquake, the 30 km depth is the down-dip edge of slip. The inversion is well constrained, ruling out any shallow slip. It is the narrow seismogenic width and the configuration of the coastline that allow for deformation to occur offshore. The minor tsunamigenesis can be accounted for by the deep slip patch. There is a significant uplift at the coast above it, which leads to negative maximum tsunami amplitudes. Finally, tide-gauge recordings show that edge-wave modes were excited and produce larger amplitudes and durations in the Gulf of Tehuantepec.

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