Dr. William Leith is a seismologist and the Senior Science Advisor for Earthquake and Geologic Hazards at the U.S. Geological Survey.  As the Senior Advisor, he oversees the Earthquake Hazards, Geomagnetism and Global Seismographic Network Programs.  Bill joined the USGS in 1986, after receiving a doctoral degree in seismology and geology from Columbia University, and a bachelor’s degree from the University of California at Berkeley.  In recent years, Bill has been called upon many times for his expertise on the subject of human-induced earthquakes, included those associated with waste fluid injection.  He gave testimony on induced seismicity to the Senate Committee on Energy and Natural Resources in June, 2012, and has given many public talks, congressional staff and agency briefings on this important topic.