Standing underneath a doorframe is also advisable.

I'm pretty sure that is advice from the last millennium that is no longer taught.

Specifically, the two reasons that it's no longer taught is that 1) rushing to get under a doorframe caused accidents 2) doorframes are no longer reinforced the way they used to be.

I suppose it must be dependent on country.

I'm a kiwi and that's what I was taught. We're also ring of fire dwellers.

How does loading up on social media help?

Maybe turn off any gas stove, secure any dangerous tools, stop your car, that kind of thing.

Modern gas stoves have security sensors to turn down themselves. I had to reset my water boiler when I got home.

It's not that social media helps, it's that there's not really more to do. It's just another day on the ring of fire.

In practice for anything short of the very biggest earthquakes, if you're close enough for the earthquake to truly be a big deal you're only getting a few seconds of warning. It's not a task list, it's stop doing the immediate dangerous thing you might be doing and grab immediate cover.