We got an earthquake alert this morning here in NorCal for a 5.6 earthquake in Mendocino County. We have some guests from out of state in the office today for a few meetings and they were shaken (no pun intended) by the alert (which was loud!). Followed by the blinds in our office rattling and light fixtures swaying, but thank goodness no ground shaking.
It reminded me when I was flying through Tokyo once and got a similar alert while at the airport (before California implemented here). It was scary but I appreciated that extra second of preparedness. It was a big earthquake.
Do you have your phone settings enabled for these alerts? Did you ever get one when out of town?