“CORKS in the Crust: Part 1” provided an introduction to fluid pressure data recorded by CORKS on the Juan de Fuca. We can link this data to measurements collected by other systems to draw conclusions about a variety of events taking place in the ocean’s crust. Katherine Inderbitzen, a graduate student at the University of Miami’s Rosenstiel School of Marine Science, wrote these exercises between dives in DSV Alvin to service CORKS near the Juan de Fuca Ridge. This activity requires some knowledge of earthquakes, but all it takes is a little analysis—don’t over think your answers!