5.7 is a nothing earthquake.
In California it is a nothing earthquake thanks to modern building codes. In a place like Mexico it can be devastating.
5.7 is starting to get up into the something earthquakes.
Is this a 5.7 in SoCal or a 5.7 in a remote mountainous mud-structure city in Iran we're talking about? Mexico lies somewhere in between those two...
Well, I'd bet to those of us who've never been experienced one lasting more than a few moments, it'd seem pretty significant.
Sometimes, sometimes not.
Not much of a problem when you are on good soil in well built buildings.
Mexico City is built to 'Mexican Casual' standards on what amounts to a bowl of jelly.