We present thermal models of the 24 Ma Cocos plate subducting under the Caribbean plate at the Nicoya Peninsula, Costa Rica. Our modeling incorporates the effect of hydrothermal cooling of the seafloor and the absence of an accretionary prism. Initial geotherms of the incoming plate, representing different effective cooling depths...
We test hypothetical tsunami scenarios against a 4,600-year record of sandy deposits in a southern Oregon coastal lake that offer minimum inundation limits for prehistoric Cascadia tsunamis. Tsunami simulations constrain coseismic slip estimates for the southern Cascadia megathrust and contrast with slip deficits implied by earthquake recurrence intervals from turbidite...
High-precision GPS geodesy in the Pacific
Northwest provides the first synoptic view of the along-strike
variation in Cascadia margin kinematics. These results constrain
interfering deformation fields in a region where typical
earthquake recurrence intervals are one or more orders of magnitude
longer than the decades-long history of seismic monitoring
and...
Characterizations of tsunami hazards
along the Cascadia subduction zone hinge
on uncertainties in megathrust rupture
models used for simulating tsunami inundation.
To explore these uncertainties, we
constructed 15 megathrust earthquake scenarios
using rupture models that supply the
initial conditions for tsunami simulations
at Bandon, Oregon. Tsunami inundation
varies with the...
