The Effects of Variable and Constant Rupture Velocity on the Generation of High-Frequency Radiation from Earthquakes

2021 ◽  
Author(s):  
Igor A. Beresnev ◽  
Kaitlyn Roxby
Keyword(s):  
High Frequency ◽  
Rupture Velocity ◽  
Frequency Radiation ◽  
High Frequency Radiation

Numerical evaluation of near-field, high-frequency radiation from quasi-dynamic circular faults

1983 ◽  
Vol 73 (3) ◽  
pp. 723-734 ◽  
Author(s):  
Michel Campillo
Keyword(s):  
High Frequency ◽  
Dominant Role ◽  
Near Field ◽  
Circular Crack ◽  
Rupture Velocity ◽  
Sudden Stop ◽  
High Acceleration ◽  
Smooth Deceleration ◽  
Frequency Radiation ◽  
High Frequency Radiation

abstract We compute the near-field, high-frequency radiation from a circular crack expanding with constant rupture velocity and discuss the characteristics of the stopping phases. We then introduce rupture velocity jumps in the fracture process. The computed accelerations show the dominant role played by the rupture front kinematics. The high acceleration pulses are associated with sudden changes of the rupture velocity. For a sudden jump (or a sudden stop), there is no theoretical high-frequency limit to the spectral density of acceleration. In order to account for fmax, we introduce a smooth deceleration of the rupture front over a time t′ in place of a sudden stop. This results in a spectral fall-off for frequencies greater than 1/t′ and supports the interpretation of fmax as a source effect.

scholarly journals Pulse-like partial ruptures and high-frequency radiation at creeping-locked transition during megathrust earthquakes

2017 ◽  
Vol 44 (16) ◽  
pp. 8345-8351 ◽  
Author(s):  
Sylvain Michel ◽  
Jean-Philippe Avouac ◽  
Nadia Lapusta ◽  
Junle Jiang
Keyword(s):  
High Frequency ◽  
Megathrust Earthquakes ◽  
Frequency Radiation ◽  
High Frequency Radiation
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