And .. speaking of clues .. SoCal (very near me), has been rumbling up to the 4.3 level off and on for over a week.
However, it is connected to an inward fault which was also responsible for a 7.1 a few years ago.
So far this week .. it has been quiet. I know that because I get automatic emails whenever there is an earthquake anywhere in the USA.
Won’t a lot of smaller earth quakes slowly release the pent up energy so a larger one won’t occur.