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Early Archean rocks generally form elongate, domal or circular bodies that are several kilometers thick. 5 years ago. [11], In the eastern Sudbury area the rock is highly crystalline hornblendic gneiss, which apparently dips at a rather low angle toward the southeast. The area had been previously shaken by the 1909 Wabash River earthquake, causing damage assessed at VII (Very strong) on the Modified Mercalli scale across the Wisconsin-Illinois border. [5]:410 The collision was oblique, resulting in dextral-thrust shear along the boundary. The earthquake that occurred Wednesday didn't happen near a fault line in Tennessee, for the most part, the state is free of any faults that would suggest a vulnerability to earthquakes. The fault surface can be vertical, horizontal,... Field, E.H., and 2014 Working Group on California Earthquake Probabilities, 2015, UCERF3: A new earthquake forecast for California’s complex fault system: U.S. Geological Survey 2015–3009, 6 p., http://dx.doi.org/10.3133/fs20153009. Two faults (located on either side of project geologist Chris Fridrich) cutting Pleistocene fluvial gravels on the northern edge of the Poncha mountain block. [8]:3 There are east-northeast- to east-trending faults in the gneissic rocks south of the Great Lakes tectonic zone in Minnesota, south of the Midcontinent Rift System in Wisconsin and in the Upper Peninsula of Michigan.

The news stories Frost quakes may be behind Wisconsin cracking sound and Mysterious noises traced to frost quakes document this type of occurrence. The pattern of sedimentation from this rifting environment continued into the Penokean orogeny, which is the next major tectonic event in the Great Lakes region. It was the largest tremor to be historically documented in Wisconsin, but was not recorded by seismographs. The collision of the gneissic Minnesota River Valley (MRV) subprovince onto the southern edge of the Superior province was another process in the slow change in tectonics[4] which marks the end of the Archean Eon. [8]:8 Lithologies of the rocks are usually gneissose and migmatitic. Furthermore, this relative change would not cause any single recognizable weather pattern that could be labelled “earthquake weather”. [3] Numerous calls were made local fire departments, police stations and newspapers. The area hardest hit was a 7,770 square kilometers (3,000 sq mi) strip of land in southeastern Wisconsin, while the earthquake was felt over a much more extensive 99 miles (159 km) wide area stretching across the Wisconsin-Illinois border, and to Lake Michigan and Waukesha. The 2,125- to 2,090-million-year-old mafic magmatic events affecting the Superior and Wyoming cratons show the hotspot having moved 500 km (310 mi) west from Sudbury, and the two provinces have rifted so that they are separated by 100 km (60 mi). If you are 13 years old when were you born? Earthquakes struck Wisconsin again in 1937 and 1939. there was a earthquake in chicago recently and someone told me a fault line runs through wisconsin..i did some research myself and there has been earthquakes here but i cant find any solid information..is there really a fault line here? Most faults produce repeated... Earthquakes occur on faults - strike-slip earthquakes occur on strike-slip faults, normal earthquakes occur on normal faults , and thrust earthquakes occur on thrust or reverse faults. [8]:8 The western part of the Southern Complex shows intricate phases of folding and foliation. An earthquake is ground shaking caused by a sudden movement of rock in the Earth’s crust. The largest earthquake on record for Wisconsin occurred on 05/12/2014, with a depth of 10.0 miles and a magnitude of 5.1 on the Richter scale in Dane County, WI. Magnitude is the most common measure of an earthquake’s size.

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