An underwater volcanic eruption in Tonga sent a small but damaging series of tsunami surges toward the California coast in January.
Tag: California Geologic Survey
Not Just for S.F. & L.A.: All Californians Should ShakeOut on Oct. 21
The Great California ShakeOut returns October 21. Practice something that doesn’t cost anything, is relatively easy to do for most people, and could save your life.
After Wildfire, Geologists Prepare for the Next Hazard: Debris Flows
After devastating wildfires, California Geological Survey and CAL FIRE teams scout the blackened ground for signs of potential debris flows.
Protecting Forests for the Other California Gold: Lumber
The lumber industry has a long history in California. Sutter’s Mill, where the discovery that started the Gold Rush was made, wasn’t a flour mill or sugar mill; it was a sawmill. Lumber’s Unfortunate Legacy Vast forests helped build and heat homes for the miners, the merchants, and the rest that followed, helping to turn…
2011 Tohoku-Oki Earthquake and Tsunami: Remembering the Victims, Learning from the Past
March 11, 2021: The California Geological Survey issues new Tsunami Hazard Area Maps for Del Norte and Mendocino counties By Rick Wilson, California Geological Survey (CGS) Many of my tsunami and non-tsunami colleagues can remember what they were doing on March 11, 2011, the day the magnitude 9 Tohoku-Oki earthquake struck offshore of Japan, unleashing…
Q&A with California Geological Survey Librarian Amy Loseth for #LibraryShelfieDay
Most folks don’t know that the Department of Conservation is home to the California Geological Survey library–full of geologic resources, maps, and even rare books dating back to the 1600s! The library, located at 801 K Street, in Downtown Sacramento (across from the Sacramento Public Library) is usually open to the public. With COVID-19 restrictions…
It’s Minerals Day — October 12
California Geological Survey geologists map rare earth minerals in the Mojave National Preserve.
CGS Geologists Assess Multiple Fire Burn Areas for Landslide Potential: 10-1-20 Update
Wildfires are a disaster that can spawn yet another disaster. Fire eliminates ground covering on slopes, exposing the soil underneath and making it more susceptible to debris flows. Such events can be catastrophic, as was the case in Montecito (Santa Barbara County) in 2018. David Longstreth, senior engineering geologist in California Geological Survey’s (CGS) Forest and Watershed Geology program, is one…
California Geological Survey Shares Expertise During Nevada’s Largest Temblor in 65 Years
The largest earthquake in Nevada in 65 years drew plenty of attention at the California Geological Survey (CGS) – not because it caused significant damage – but because it helps paints a clearer picture of what’s going on under the Earth’s surface in the east/central part of our state. That’s important for an institution that…
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…