Surface Wave Imaging of the Juan de Fuca Plate
Surface waves from teleseismic earthquakes can help us constrain seismic shear wave velocities related to lithospheric structure. Using the ASWMS package we create phase velocity maps that cross the coastline, extending over the entire Juan de Fuca plate and Cascadia subduction region (shown adjacent, using Cascadia Initiative data years 1-3). We see evidence of features such as the subducting slab, the transition from oceanic to continental lithosphere, the Juan de Fuca ridge, and the volcanic arc. The incorporation of the final year of data and using tilt and compliance corrections on the OBS instruments will improve our data quality and coverage.