Last updated on April 24, 2014 at 10:25 EDT

Seismic Survey of the Mariana Trench

March 26, 2012

Water dragged down into the Mariana trench is thought to cause volcanic eruptions and earthquakes. WUSTL seismologist Doug Wiens describes his voyage to drop hydrophones and ocean-bottom seismometers across the trench.  credit:  Washington University