This region is a seismically active region. Today we had a M 6.2 earthquake. Here is the USGS web page for this earthquake.
Last November, there were a series of large magnitude compression aearthquakes. Here are some posts about these earthquakes.
- 11/15/14 M 7.1
- 11/21/14 M 6.5
- 11/26/14 M 6.8
Here is a more detailed tectonic map with a cross section showing how these two opposing subduction zones are configured. This is from a Geological Society of America Special paper here.