Dynamic weakening of ring faults and catastrophic caldera collapses

Geology ◽  
2019 ◽  
Vol 47 (2) ◽  
pp. 107-110 ◽  
Author(s):  
Raehee Han ◽  
Jong-Sun Kim ◽  
Chang-Min Kim ◽  
Takehiro Hirose ◽  
Jong Ok Jeong ◽  
...  
Keyword(s):  
Dynamic Weakening ◽  
Ring Faults

scholarly journals Stress fields generating ring faults in volcanoes

1997 ◽  
Vol 24 (13) ◽  
pp. 1559-1562 ◽  
Author(s):  
Agust Gudmundsson ◽  
Joan Marti ◽  
Elisenda Turon
Keyword(s):  
Stress Fields ◽  
Ring Faults

What Caused the 2011 Tohoku-Oki Earthquake? : Effects of Dynamic Weakening

2014 ◽  
Vol 9 (3) ◽  
pp. 252-263
Author(s):  
Bunichiro Shibazaki ◽  
◽  
Hiroyuki Noda ◽  
Keyword(s):  
Plate Boundary ◽  
Japan Trench ◽  
Plate Interface ◽  
Megathrust Earthquakes ◽  
Shallow Subduction ◽  
Thermal Pressurization ◽  
Dynamic Weakening ◽  
Recurrence Intervals ◽  
Earthquake Effects ◽  
Experimental And Theoretical Studies

Some observational studies have suggested that the 2011 great Tohoku-Oki earthquake (Mw9.0) released a large portion of the accumulated elastic strain on the plate interface owing to considerable weakening of the fault. Recent experimental and theoretical studies have shown that considerable dynamic weakening can occur at high slip velocities because of thermal pressurization or thermal weakening processes. This paper reviews severalmodels of the generation of megathrust earthquakes along the Japan Trench subduction zone, that considers thermal pressurization or a friction law that exhibits velocity weakening at high slip velocities, and it discusses the causes of megathrust earthquakes. To reproduce megathrust earthquakes with recurrence intervals of several hundreds of years, it will be necessary to consider the existence of a region at the shallow subduction plate boundary where significant dynamic weakening occurs due to thermal pressurization or other thermal weakening processes.

Fault Heals Rapidly after Dynamic Weakening

2009 ◽  
Vol 99 (6) ◽  
pp. 3470-3474 ◽  
Author(s):  
K. Mizoguchi ◽  
T. Hirose ◽  
T. Shimamoto ◽  
E. Fukuyama
Keyword(s):  
Dynamic Weakening
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