Arizona Earthquake Information Center

                               EXPLANATION:

                                           --Depths are expressed in kilometers and fixed at 10 where necessary
                                           --Origin Time = Times prior to 1910 are local Arizona time
                                                                    Times during and after 1910 are Greenwich Mean Time (GMT)
                                           --MAG/INT = Magnitude or Intensity
                                                                  Roman numerals indicate Modified Mercalli (MM) Intensities
                                                                  Arabic numerals indicate local Richter magnitude, (M_L)
                                           --Locations are in NAD 27 unprojected lat/long

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

Arizona Seismology Trivia

Question: What is the significance of this seismogram?

click for the answer

Scroll through all 176 years of data or link directly to a time frame of interest.

1830-1899 1900-1909 1910-1919 1920-1929 1930-1939 1940-1949 1950-1959

1960-1969 1970-1979 1980-1989 1990-1999 2000-present Earthquakes of M≥4.9

			LOCATION		DEPTH	ORIGIN TIME			MAG/
YEAR	MO	DAY	LAT(N)	LONG(W)	(km)	HR	MIN	SEC	INT	LOCATION

1830			31.9	110.1					IX	San Pedro

1870	3	11	34.55	112.47		10	20		V	Prescott
	8	12	34.55	112.47					IV	Prescott

1871	2	7	34.1	112.44		15	8		V	Constellation

1872	5	2	32.72	114.62		17	45		VII	Yuma*
	5	28	32.72	114.62		2	0		II	Yuma*

1874	11	10	32.72	114.62		15	0		IV	Yuma*

1875	1	21	33.65	114.5		19	45		V	Camp La Paz
	3	9	33.46	112.07					II	Phoenix
	11	1	32.72	114.62		8	30		V	Yuma*
	11	3	32.72	114.62		13	0		VI	Yuma*
	12	15	33.2	112.1		15	45		II	Maricopa Wells

1876	4	20	32.72	114.62		7	0		V	Yuma*