[iris-bulk] AGU Session: T10 - The Base of the Crustal Seismogenic Zone

[IRIS]

AGU Fall Meeting, Special Session December 15-19, San Francisco

T10 - The Base of the Crustal Seismogenic Zone

Sessions - Tectonophysics, Seismology

The critical transition from seismic to aseismic deformation at the  
base of the crustal seismogenic zone is inferred to be a region of  
time-dependent rheology where mixed continuous and discontinuous  
shearing occurs at varying strain-rates in response to the cycling of  
shear stress and, possibly, pore-fluid pressure. Seismologists,  
geodesists, structural geologists, practitioners of experimental rock  
mechanics, and rheological modelers are invited to address: (1) the  
relationship between the microseismic zone and mainshock-aftershock  
sequences, particularly the extent to which large ruptures may  
propagate to depths greater than the background microseismic zone; (2)  
physical factors and lithological controls affecting the depth of the  
seismogenic zone; (3) the structure, localization, and internal  
deformation mechanisms of crustal fault zones across this rheological  
transition; (4) stress/fluid-pressure conditions associated with the  
base of the seismogenic zone; (5) the rela!
tionship of fault interseismic locking depths to the seismogenic zone;  
(6) relationships between aftershock activity and the rheological  
transition at the base of the seismogenic zone.

Nick Beeler, Roland Burgman, Egill Hauksson, Rick Sibson, (Conveners)