The U.S. Geological Survey have been developing an earthquake early warning system called ShakeAlert for nearly two decades. ShakeAlert is now operating in California, Oregon and Washington state The U.S. Geological Survey are now looking to expand the service to Alaska.
The system monitors for seismic activity and then calculates where the next earthquakle will be, alerting those locations by push notifications to their phones. The alert is intended to provide enough warning for people to prepare.
A wonderful use of technology to reduce the risk of injury.
ShakeAlert got one of its largest tests with that October earthquake, when it took less than 10 seconds for the system to send about 2.1 million warnings to Californians like me. Thankfully, there were no reports of major injuries. For me, the little bit of early notice helped me prepare mentally for what was about to come.
https://www.washingtonpost.com/technology/2022/11/14/earthquake-early-warning/