Numerous people in the Detroit area are reporting on social media that they felt tremors.
The earthquake reportedly occurred about 8:15 p.m. Thursday, April 19, 2018.
A 3.6 magnitude earthquake falls with in II and III on the Modified Mercalli Intensity Scale, according to USGS, which means:
It is "felt only by a few persons at rest, especially on upper floors of buildings."
It is "felt quite noticeably by persons indoors, especially on upper floors of buildings. Many people do not recognize it as an earthquake. Standing motor cars may rock slightly. Vibrations similar to the passing of a truck."
http://www.mlive.com/news/detroit/index.ssf/2018/04/a_36_magnitude_earthquake_occu.html
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