Boston, Massachusetts – A rare Midwest earthquake early Tuesday is now putting New England on notice as a powerful surge of Arctic air drives temperatures sharply lower, creating conditions that can lead to frost quakes across the region.
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 a wide portion of Illinois, with thousands reporting shaking and loud rumbles before sunrise. While no damage was reported, earthquakes of this size are uncommon in the Midwest, making the event notable as extreme cold expands east.
As the deep freeze settles into New England, geologists say rapid temperature drops can trigger frost quakes, also known as cryoseisms. These occur when moisture in the ground freezes suddenly, causing soil and rock to contract and fracture. The result can be a loud boom or brief shaking that may rattle homes, vehicles, and windows, often overnight or before dawn.
Northern New England, including Maine, New Hampshire, and Vermont, may be especially susceptible due to frozen ground and recent moisture. Parts of Massachusetts, Rhode Island, and Connecticut could also see isolated incidents as temperatures plunge well below normal. Frost quakes are shallow and localized but can crack pavement, foundations, and underground utilities.
Emergency officials emphasize that frost quakes are not related to fault lines and do not signal larger earthquakes. Residents are encouraged to remain alert during the coldest periods, inspect property if shaking is felt, and report loud booms or ground movement to local officials or the USGS. With dangerous cold expected to persist through midweek, additional advisories or alerts may be issued as conditions continue to evolve.
