April 22, 2002



A magnitude 2.3 earthquake struck on the northeast side of the San Francisco Peaks on April 20,2002 at 12:17pm. The earthquake epicenter was located 13 miles (21 km) north of Flagstaff and 6 miles (10 km) west of Sunset Crater. The earthquake cannot be located on any known active fault. No reports that the earthquake was felt by anyone in Flagstaff have been received. This was a very small tremor.

The Flagstaff area has experienced moderate earthquakes in the past. In 1910, a magnitude 6.0 (estimated) earthquake occurred in the same area and in 1912 a magnitude 6.2 (estimated) quake occurred west of Flagstaff. The strongest earthquake in recent time was a magnitude 5.3 trembler that was centered at Cataract Creek just south of the junction of AZ Hwy 64 and U.S. Hwy 180 and was felt in Flagstaff and the Grand Canyon.

The earthquake data is as follows: