While popular thought associates earthquakes in the United States with California, and with good reason, EQs have occurred throughout the United States. I believe there are only two states from which quakes have not been reported. Central Canada is extremely stable.

Remember, the most severe quake in US history did not occur in California. It struck 200 years ago.

Unlike most weather events, there are no reliable predictors or precursors of quakes. They just happen and there you are. It is smart in EQ country to never let your gas tank fall below 1/2 full. (I am in violation of this standard as I type this....)