This is quite interesting and unusual historically. There was an earthquake in SE Arizona near the New Mexico border at about 10 pm local time. Here are a few links:
- USGS site on the event
- USGS site Did You Feel It shows that it was widely and lightly felt across southeastern Arizona and southwestern New Mexico
- TUC vertical long period seismogram from Tucson show the event and aftershocks
- Arizona earthquake history from AEIC does not show a lot of activity historically there
- AZ Oil and Gas information I wonder if associated with oil and gas activities? AZ Is Hydraulic Fracturing a Threat in Arizona? (from AZGS).