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ShakeAlert is an earthquake early warning system (EEW) in the United States, developed and operated by the United States Geological Survey (USGS) and its partners. [1] As of 2021, the system issues alerts for the country's West Coast (specifically the states of California, Oregon and Washington ). It is expected that the system will be expanded ...
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. These maps are used by federal, state, and local organizations, both public and private, for post-earthquake ...
The 1971 San Fernando earthquake (also known as the 1971 Sylmar earthquake) occurred in the early morning of February 9 in the foothills of the San Gabriel Mountains in southern California. The unanticipated thrust earthquake had a magnitude of 6.5 on the Ms scale and 6.6 on the Mw scale, and a maximum Mercalli intensity of XI ( Extreme ).
“Drop, Cover, Hold on. Protect yourself,” the U.S. Geological Survey warned moment before the eathquake struck.
It has been several years since a magnitude 5.2 or greater earthquake hit Southern California, and Tuesday's quake was the strongest to strike the region in three years. A magnitude 5.3 quake ...
The 1989 Loma Prieta earthquake occurred on California's Central Coast on October 17 at 5:04 p.m. local time. The shock was centered in The Forest of Nisene Marks State Park in Santa Cruz County, approximately 10 mi (16 km) northeast of Santa Cruz on a section of the San Andreas Fault System and was named for the nearby Loma Prieta Peak in the Santa Cruz Mountains.
A 4.0-magnitude earthquake shook Southern California, the U.S. Geological Survey reported.. The 6.5-mile-deep quake hit about 5 miles southeast of Ojai at 1:12 p.m. Friday, Nov. 3, according to ...
Foreshocks. 6.1 Mw April 23 at 4:51 [4] Casualties. 3 killed. 400+ injured. The 1992 Landers earthquake occurred on Sunday, June 28 with an epicenter near the town of Landers, California, in San Bernardino County. [5] The shock had a moment magnitude of 7.3 and a maximum Mercalli intensity of IX ( Violent ). [6]