2011 Herzberg Lecture - featuring Dr. John Cassidy

Ottawa-Carleton Geoscience Centre

Invited Speaker Series


Thursday, November 10th, 11:30AM, HP 3120


An overview of recent earthquake hazard studies along Canada's west coast


Dr. John Cassidy

Geological Survey of Canada

Head, Earthquake Seismology Section


 Recent subduction earthquakes around the world (Japan, Chile, Sumatra) remind

us of the devastating impacts of this type of event. The Cascadia subduction zone along

Canada's west coast also produces M 9 earthquakes, the most recent on January 26, 1700.

In this presentation I will provide an overview of some recent geophysical studies in Cascadia

designed to improve our assessments of subduction zone hazards. These include:

the deployment of the NEPTUNE Canada seafloor instruments and the SEAJade project

to map the subducting plate and seismicity near the locked portion of the subduction fault;

studies of the earthquake focal mechanisms and the regional stress field above the

subducting plate; modelling of seismic and GPS data; new paleoseismological results;

and an update on Episodic Tremor and Slip and possible links with seismicity in the

Cascadia subduction zone.


 The talk will be followed by a light lunch for those in attendance.