The first, a magnitude 3.2 quake, struck at 8:59 p.m. (10:59 p.m. ET), the U.S. Geological Survey said.
The second, a magnitude 4.1 tremor, happened at 11:29 p.m.
The third, a magnitude 4.0 quake, took place at 11:49 p.m.
Several cities in the area felt shaking.
“Ground, walls and bed shook here in South Scottsdale…twice!” Deborah Groseclose tweeted.
More reports across Facebook and Twitter indicated a widespread swath of shaking as a result of the swarm..
There is another swarm still occurring around he west coast .. And with that, my favorite earthquake predictor Dutchsinse is calling for a larger shake in the next 2-6 days..
Be alert and have a plan.