Detroit, Michigan – A rare Midwest earthquake early Tuesday is drawing attention across Michigan as an intense blast of Arctic air pushes temperatures into extreme territory, creating conditions that can trigger frost quakes during the coldest hours.
According to the U.S. Geological Survey, a 3.5 magnitude earthquake struck central Illinois shortly before 2 a.m. Tuesday, centered about 35 miles south of Springfield. The shallow quake was felt across much of Illinois, with thousands reporting shaking and loud rumbles before sunrise. While no damage was reported, seismic events of this size are unusual for the region.
As the cold intensifies across Michigan, geologists warn that rapid temperature drops can cause frost quakes, also known as cryoseisms. These occur when water-saturated ground freezes suddenly, forcing soil and rock to crack and shift. The result can be a loud boom, vibration, or brief shaking that may rattle homes, garages, and vehicles, often overnight.
Northern and central Michigan, along with parts of Southeast Michigan including Detroit, Ann Arbor, Flint, and Lansing, could be most susceptible as temperatures plunge well below normal following recent snow and moisture. Frost quakes are shallow and localized but can crack pavement, foundations, and underground pipes.
Emergency officials stress that frost quakes are not tied to fault lines and do not signal larger earthquakes. Still, residents are encouraged to remain alert, secure loose items, and inspect property if shaking is felt. With dangerous cold expected to linger through midweek, additional alerts or advisories may be issued as conditions continue to evolve.
