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The U.S. Geological Survey and the Pacific Northwest Seismic Network on May 4 released a new early warning system that can notify mobile phone users in the state that the shaking is about to start.
An animation detailing how ShakeAlert functions. 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 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.
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.
Earlier this month, Washington joined California and Oregon in using the U.S. Geological Survey's ShakeAlert system for earthquake early warning. The program, which has been in the works since ...
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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.