The Mammoth Lakes Earthquakes – 40th Anniversary

On May 25, 1980–nearly one week after the spectacular eruption of the Mount St. Helens volcano–at 9:33 a.m. PST, a magnitude 6.0 earthquake rocked through Mammoth Lakes, California. During the next 16 minutes, four more shocks, magnitude 4.1 – 5.5 followed. This seismic activity was the beginning of an earthquake sequence that produced 72 magnitude…

The World’s Largest Earthquake Drill

Are You Ready to ShakeOut? With 318 million people living and working in the United States, a major earthquake could cause unprecedented devastation. What we do now, before a big earthquake, will determine how well we survive and recover. Great ShakeOut Earthquake Drills in October 2017 involved more than 56.2 million participants through broad-based outreach…