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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.
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 ...
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[2] [38] Smartphones are used to detect the ground shaking induced by an earthquake and a warning is issued as soon as an earthquake is detected. People living at a further distance from the epicenter and the detection point may be alerted before they are reached by the damaging waves of the earthquake.
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In addition to seismometers, the system now also incorporates GPS and satellite navigation data to improve results and send alerts more quickly.