The Arizona Broadband Seismic Network documented over 50 earthquakes in Arizona from January to July 2013.
On July 7that 1:38 MST, a magnitude (*Mw) 3.5 earthquake shook the towns of Fredonia, Jacobs Lake, and Havasu (Figure 1).
In 2011, 131 instrumentally detected earthquakes were recorded in Arizona. Most of the seismicity occurred in the north-northwest quadrant of the state.
In June 2011, the Arizona Integrated Seismic Network (AISN) detected notable earthquakes in three areas: near Parks, near Tusayan, and just south of Flagstaff adjacent to the Lake Mary fault, AZ. There were two notable events near Parks this June and two similar events in April. The June events were M 2.37 and 2.4 in size.