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The red dots show larger-magnitude earthquakes in Minnesota, Wisconsin, Michigan's Upper Peninsula and southern Ontario. The earthquake near Minnesota's western "bulge" is the Morris earthquake. This map and table shows where Minnesota's earthquakes have occurred. Earthquakes 1, 6, 9, 11, 15 and 18 are in the Great Lakes tectonic zone.
The 1975 Morris earthquake occurred in western Minnesota on July 9 at 14:54:15 UTC, or 9:54 a.m. local time. [2] The strongest instrumentally recorded rupture in the history of the state, it registered at magnitude 4.6 M n and had a maximum Mercalli intensity of VI (Strong).
1979 Imperial Valley earthquake – magnitude 6.4 earthquake with an epicenter less than 1 km inside Mexico – significant damage and injuries on both sides of the border (60 in the US) 2010 Baja California earthquake (Mexico near S California) – magnitude 7.2 earthquake, 4 fatalities and 100 injuries, none in the United States
The color-coded map shows a range of earthquake probability across the U.S. Well known high-risk areas, such as California and Alaska, are coded in dark red, denoting the highest risk.
Earthquakes in the New Madrid and Wabash Valley seismic zones from 1974 to 2002, with magnitudes larger than 2.5. The zone had four of the largest earthquakes in recorded North American history, with moment magnitudes estimated to be as large as 7 or greater, all occurring within a 3-month period between December 1811 and February 1812. Many of ...
Minnesota is geologically quiet today; it experiences earthquakes infrequently, and most of them are minor. [7] The state's high point is Eagle Mountain at 2,301 feet (701 m), which is only 13 miles (21 km) away from the low of 602 feet (183 m) at the shore of Lake Superior.
A small earthquake shook homes along the southern stretch of the Tri-Cities on Friday night. At around 9:20 p.m. a 2.8 magnitude earthquake was registered two miles from Richland by the Pacific ...
The 1975 Morris earthquake occurred on July 9, and was the state's largest 20th-century earthquake, rated at 4.6 M n. [14] [15] [16] On June 4, 1993, another quake slightly shook the community. This one measured 4.1 in magnitude and was the third-largest earthquake in Minnesota in the 20th century. [17]