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You can view a map here of how much advance warning people with ShakeAlert-enabled phones (like Pixel) got before the earthquake:

https://earthquake.usgs.gov/earthquakes/eventpage/nc73799091...

Santa Clara had 2 seconds of advance warning, and Sunnyvale had 4 seconds. San Francisco got 18 seconds of warning, though was outside the "ground motion" zone.



I honestly thought it was someone rolling a big cart across the floor above mine. I was really surprised when I saw 5ish magnitude.

Definitely worth checking the earthquake kit though!




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