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.
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.