John Vidale is a seismologist who studies earthquakes, volcanoes, and ways to mitigate the hazards associated with them. He works primarily in the Cascadia Subduction Zone, studying why volcanoes sometimes scream before they erupt, as well as the tectonic jitters of Mt. Rainier. He uses seismometers to study structures within the Earth, having recently taken a look deep under Mt. St. Helens and Puget Sound. The Director of the Pacific Northwest Seismic Network, he is also the Washington State Seismologist, and is working to develop an earthquake early warning system for the state. In recognition of his work, he was elected a Fellow of the American Geophysical Union, also received that organization’s James B. Macelwane Medal, and in 2011 was named Outstanding Researcher in the College of the Environment.