M4.6 earthquake in California triggers ShakeAlert - March 21, 2023

Mar 22, 2023

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A M4.6 earthquake isn't that exciting, even in California. But what IS exciting is that the USGS has an extra tab for this event - the ShakeAlert® result! ShakeAlert is the earthquake early warning system for the US West coast.

*Source: USGS https://earthquake.usgs.gov/earthquakes/eventpage/nc73860415/shake-alert*

This is how earthquake early warning works:

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