A 7.1-magnitude earthquake rocked communities near the Mojave Desert on Friday, one day after a 6.4-magnitude quake there.
According to CNN, aftershocks have occurred an average of once a minute since Friday night.
The United States Geological Survey warned that another earthquake of a similar magnitude could strike within the next week.
There's a looming danger of one along the imposing San Andreas fault zone to the west, which could cause significantly more damage.
Fault lines occur where rocks on two sides push against or slide past each other, displacing the earth's crust.