(Photo courtesy of U.S. Geological Survey)

A cluster of earthquakes in mid-April in northwestern Arizona.

Several earthquake swarms have been detected in northern Arizona this month. One event registered nearly 20 small quakes, while another included a 3.7-magnitude quake.

The U.S. Geological Survey keeps track of earthquake events all over the world with an interactive map. You can even customize your own map using its ShakeMap tool.

Here's a look at the seismic activity — 2.5 magnitude or larger — recorded in Arizona in the past 30 days. Click a point to get more information about an individual event or click the gear symbol in the upper right corner of the map to explore more options.

Source: U.S. Geological Survey