In this lab, students investigate mysterious ground motions along the Pacific Northwest Coast. The investigation begins as students familiarize themselves with the tectonic setting of the Pacific Northwest coastal region . Next, students explore and explain the movement of the Cape Mendocino, CA region that occurred on April 25th, 1992 using data (vector) from high-precision Global Positioning System (GPS) stations and earthquake location data. This case is contrasted with movement recorded by GPS (time-series) in British Columbia from 2004 to 2011. Finally, students investigate a model to explain the GPS time series data for the British Columbia region.
The development of this resources was funded by the National Science Foundation via Award # 0942518
Students will be able to…
- Describe the process of Episodic Tremor and Slip and contrast this with the traditional earthquake cycle or Elastic Rebound Theory.
- Demonstrate how GPS and seismic observations support our understanding of Episodic Tremor and Slip
- Describe the seismic hazard created as the Juan de Fuca plate subducts beneath the North American plate.