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Chart of Colorado's Largest Historic Earthquakes

  • Published
  • Updated
  • by City Manager
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The following chart provides data back to 1867.

DATE

LOCATION

MAGNITUDE

INTENSITY

1870, Dec. 4

Pueblo-Ft. Reynolds

--

VI

1871, Oct

Lily Park, Moffat Co.

--

VI

1880, Sep. 17

Aspen

--

VI

1882, Nov. 7

North-Central CO

6.5*

VII

1891, Dec.

Maybell

--

VI

1901, Nov. 15

Buena Vista

--

VI

1913, Nov. 11

Ridgway area

--

VI

1944, Sep. 9

Montrose/Basalt

--

VI

1955, Aug. 3

Lake City

--

VI

1960, Oct. 11

Montrose/Ridgway

5.5

V

1966, Jan. 4

N.E. of Denver

5.0

V

1966, Jan. 23

CO-NM border near Dulce, NM

5.5

VII

1967, Aug. 9

N.E. of Denver

5.3

VII

1967, Nov. 27

N.E. of Denver

5.2

VI

Prepared by the Earthquake Subcommittee - Colorado Natural Hazards Mitigation Council

* = magnitude estimated for older earthquake; based on historical felt reports