[Lance_ET_Compte]

In the Bay Area, everyone gets an SMS message that says an earthquake is coming. I've felt/heard the shaking 10-20 seconds later.

Some industrial equipment shuts down to avoid damage.

[nashashmi]

We felt it at 10:26 am ET. And an alert was sent to everyone at 11:24 am that an earthquake is coming. And then another one alerting for possibility of aftershocks. No aftershocks felt.