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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 ).
An earthquake magnitude should be measured at a 4.5 size for the ShakeAlert system to go into action. Wednesday’s earthquake was originally clocked at 4.7, but later downgraded to 4.2.
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An animation detailing how earthquake warning systems work: When P waves are detected, the readings are analyzed immediately, and, if needed, the warning information is distributed to advanced users and cell phones, radio, television, sirens, and PA systems/fire alarm systems before the arrival of S waves.
The program, which has been in the works since 2006, picks up shaking from sensors ... It's time to make sure your phone will get Washington's new ShakeAlert early earthquake warnings Skip to main ...
In addition to seismometers, the system now also incorporates GPS and satellite navigation data to improve results and send alerts more quickly.
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Apr. 24—The state is rolling out a new early warning system for earthquakes in our area and the Washington Emergency Management Division is hosting a free webinar to detail the new technology.