Upper plate deformation and seismic barrier in front of Nazca subduction zone: The Chololo Fault System and active tectonics along the Coastal Cordillera, southern Peru

2008 ◽  
Vol 459 (1-4) ◽  
pp. 174-185 ◽  
Author(s):  
Laurence Audin ◽  
Pierre Lacan ◽  
Hernando Tavera ◽  
Francis Bondoux
Keyword(s):  
Subduction Zone ◽  
Active Tectonics ◽  
Fault System ◽  
Coastal Cordillera ◽  
Southern Peru ◽  
Plate Deformation

A mega-splay fault system and tsunami hazard in the southern Ryukyu subduction zone

2013 ◽  
Vol 362 ◽  
pp. 99-107 ◽  
Author(s):  
Shu-Kun Hsu ◽  
Yi-Ching Yeh ◽  
Jean-Claude Sibuet ◽  
Wen-Bin Doo ◽  
Ching-Hui Tsai
Keyword(s):  
Subduction Zone ◽  
Tsunami Hazard ◽  
Fault System ◽  
Splay Fault

scholarly journals Paleotsunamis on the Southern Hikurangi Subduction Zone, New Zealand, Show Regular Recurrence of Large Subduction Earthquakes

2021 ◽  
Vol 1 (2) ◽  
pp. 75-84
Author(s):  
Charlotte Pizer ◽  
Kate Clark ◽  
Jamie Howarth ◽  
Ed Garrett ◽  
Xiaoming Wang ◽  
...  
Keyword(s):  
Confidence Interval ◽  
Subduction Zone ◽  
Recurrence Interval ◽  
Fault System ◽  
Plate Boundaries ◽  
The Past ◽  
Subduction Earthquakes ◽  
Tsunami Hazard Assessment ◽  
First Time ◽  
Large Earthquakes

Abstract Geological records of subduction earthquakes, essential for seismic and tsunami hazard assessment, are difficult to obtain at transitional plate boundaries, because upper-plate fault earthquake deformation can mask the subduction zone signal. Here, we examine unusual shell layers within a paleolagoon at Lake Grassmere, at the transition zone between the Hikurangi subduction zone and the Marlborough fault system. Based on biostratigraphic and sedimentological analyses, we interpret the shell layers as tsunami deposits. These are dated at 2145–1837 and 1505–1283 yr B.P., and the most likely source of these tsunamis was ruptures of the southern Hikurangi subduction interface. Identification of these two large earthquakes brings the total record of southern Hikurangi subduction earthquakes to four in the past 2000 yr. For the first time, it is possible to obtain a geologically constrained recurrence interval for the southern Hikurangi subduction zone. We calculate a recurrence interval of 500 yr (335–655 yr, 95% confidence interval) and a coefficient of variation of 0.27 (0.0–0.47, 95% confidence interval). The probability of a large subduction earthquake on the southern Hikurangi subduction zone is 26% within the next 50 yr. We find no consistent temporal relationship between subduction earthquakes and large earthquakes on upper-plate faults.

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