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Five Columbia University undergraduates go to sea aboard the R/V Thompson as part of a class ‘Sea-going Experience in Earth Sciences’. Read below to follow along with their adventures!The students are participating in leg 2 of the 2012 field season for the Cascadia Experiment, a large community seismic and geodetic experiment studying questions ranging from megathrust earthquakes to volcanic arc structure to the formation, deformation and hydration of the Juan De Fuca and Gorda plates. The goal of the leg 2 research cruise is to recover 24 ocean bottom seismometers (OBSs) deployed in 2011, and deploy an additional 6. 20 of the OBSs are a new design called a Trawl Resistant Mount (TRM) designed to be deployed in shallow waters that are heavily fished. With a new instrument design and the remotely operated vehicle (ROV) Jason onboard to help with TRM recoveries there are many opportunities for the unexpected.