The red polygon is the reporting region for  this map; the black polygon is the authoritative region of the PNSN. Events inside the authoritative network are rendered as cirlces; events outside the authoritative region but inside the reporting region are rendered as squares. Explosions are always rendered as stars.  More

 Create a custom cross-section or depth-time plot. Click on "Custom Plot" to start.

Show known faults in the PNW region.