— A magnitude 5.1 earthquake hit northwestern Wisconsin on Friday afternoon and a swarm of quakes rattled nearby communities, with some quakes shaking buildings and damaging power lines.
Officials said the earthquake was centered about 70 miles northeast of Madison.
The U.S. Geological Survey reported an epicenter was about 150 miles east of Madison in the town of Green Bay.
State and local officials are monitoring the quakes and have mobilized emergency crews and vehicles to help people evacuated from their homes, said Dan Richey, a spokesman for the U.K. National Grid.
Richey said the epicenter of the quake was at the northeast edge of the region’s Mason-Dixon line, which runs through Madison and other communities.
Madison, about 15 miles west of the epicentre, was under a temporary state of emergency because of the quake, which was felt in some parts of the city.
Emergency workers and others who were nearby were being directed to evacuate from their residences and businesses, according to the U-S Geological Survey.
In a message posted on social media, the U,S.GS said the quaking was felt throughout the region and was felt along the Mason-Diamond line as far as Lake Superior, the largest freshwater lake in the United States.
There was no immediate damage, the agency said.
More: Residents were told to stay indoors and not to venture out.
A tornado warning was issued for parts of Wisconsin, Ohio and Kentucky.
People were urged to take precautions and not get close to power lines and other structures.
On Twitter, Gov.
Brad Schimel tweeted that the area was under an emergency declaration and was experiencing a “quake, very intense shaking.”
A large area of the Mason Dixon line, the line between Mason and Diamond, is shaking right now.
Please avoid all open areas.
pic.twitter.com/Qz6c7qKqZs — Brad Schimmel (@GovBradSchimmel) January 20, 2021The U-K.
National Grid said on its Twitter feed that power lines in the city of Madison were shaking.
“The power lines are very much shaking,” the grid said.
“The Mason Dixon Line was experiencing strong shaking.
There are some power lines being damaged.
If you’re not able to get to a safe place, you’re advised to take shelter.”
The U SGS said there was no tsunami warning.
Power outages were expected throughout the day.