What causes a volcanic eruption? Is there always lava? How are volcanoes and earthquakes related? Travel with the STEM in 30 team to the Pacific Northwest, home to some of the most seismically active areas in the U.S. Learn from experts about tectonic activity and find out if they know when the “big one” will hit.

Keywords: #airandspace, NASM, National Air and Space Museum, earthquakes, volcanoes