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Logo of the ANSS. The Advanced National Seismic System (ANSS) is a collaboration of the United States Geological Survey (USGS) and regional, state, and academic partners that collects and analyzes data on significant earthquakes to provide near real-time (generally within 10 to 30 minutes [1]) information to emergency responders and officials, the news media, and the public. [2]
In California, tsunami hazard areas stretch from Crescent City to San Diego. The current maps are drawn with boundaries from the California Geological Survey. The hazard zones are highlighted in ...
The 2008 Uniform California Earthquake Rupture Forecast, Version 2, or UCERF2, is one of a series of earthquake forecasts prepared for the state California by the Working Group on California Earthquake Probabilities (WGCEP), collaboration of the United States Geological Survey, the California Geological Survey, and the Southern California ...
ShakeMap is a product of the U.S. Geological Survey (USGS) to map the shaking of earthquakes.According to the USGS, "ShakeMaps provide near-real-time maps of ground motion and shaking intensity following significant earthquakes.
New technology in 2021 allowed the state’s geological survey to update its maps from 2009. A tsunami triggered by a large earthquake in Alaska would take approximately five hours to reach the ...
A map shows earthquakes above magnitude 2.5 that struck in the last week in Southern California. Quakes marked in orange occurred over a 24-hour period ending at 9 a.m. Monday, while those in ...
Probabilistic seismic hazard map. The earliest known earthquake in the U.S. state of California was documented in 1769 by the Spanish explorers and Catholic missionaries of the Portolá expedition as they traveled northward from San Diego along the Santa Ana River near the present site of Los Angeles. Ship captains and other explorers also ...
Large earthquakes also occurred near the junction in northern California in previous Decembers, according to the geological survey. There were two, a 6.1 and 6.0, near Petrolia in 2021 and a 6.4 ...