Here's an article from the #SFGate regarding #EarthquakeMyths. I agree with all of them except for #DropCoverHoldOn . . . which is oversimplified.
If you know anything about guns, there is the concept of #concealment vs #cover. Concealment means you can't be seen by a possible attacker. Cover means that you are protected behind something that will stop a bullet.
In an earthquake, taking "cover" under a table or another "solid object" may or may not protect you from the roof falling down upon you.
If it's the best thing you can do, so be it but, in order to be fully protected, you need to get under something that withstand a complete collapse of the building you're in &, no matter what happens, DO NOT run outside where there is no protection whatsoever, especially if you are in a dense skyscraper dominated environment like downtown #SF . . .
https://www.sfgate.com/bayarea/article/california-earthquake-myths-21299654.php