A magnitude 5.3 earthquake occurred near Duncan, AZ at approximately 10 pm on June 28th, 2014. This was the largest earthquake to occur in southeastern Arizona – southwestern New Mexico in 75 years, and it serves as a reminder that Arizona does indeed have earthquakes and earthquake hazards.
During 2013, the Arizona Geological Survey (AZGS) cataloged over 100 Arizona earthquakes, participated in multiple outreach activities, and acted as resource experts for the seismic source characterization project for the Palo Verde Nuclear Power Plant.
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 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.