ARIZONA EARTHQUAKES 1830-2011
ARIZONA EARTHQUAKE INFORMATION CENTER

Updated to February, 2011

All times are Greenwich Mean Time (GMT)
Depths are expressed in kilometers and fixed at 10 where necessary

*FLAG = Seismic Research Station at Northern Arizona University, Flagstaff
**Origin Time = Times prior to 1910 are local Arizona time; times 1910 and after are Coordinated Universal Time
***MAG/INT = Magnitude or Intensity
Roman numerals indicate Modified Mercalli (MM) Intensities
Arabic numerals indicate local magnitude, ML
Magnitude with asterisk (*) indicate duration magnitude, MD

****4 * = Earthquakes which may locate in the Salton Trough region