A 2.4-magnitude earthquake rattled the Mid-coast on Monday, knocking items off shelves in Bath, sending homeowners to check on boilers in Georgetown and Arrowsic and unleashing a flood of calls to emergency agencies.

Times Record readers reported feeling the quake in Arrowsic, Bath, Woolwich, Wiscasset and as far away as Bowdoinham. An Arrowsic homeowner called to report “a loud explosion that rocked our house.”

There were no reports of injuries or major damage.

Maine Yankee site manager Jim Connell said officials enacted the mothballed power plant’s disaster plan “immediately,” inspecting the casks of nuclear waste being stored there and finding no damage.

Karen Peterson, an official with the USGS, said the epicenter of the low-magnitude earthquake that struck at 1:19 p.m. Monday was four miles southeast of Boothbay Harbor and 21 miles east-southeast of Brunswick. 

That was close enough for Allison Bies of Arrowsic.

“It actually rocked the house,” said Bies, a self-described California transplant. “I thought it was an earthquake at first, then I thought maybe it was our propane tank. I checked the propane and it was OK. It sounded like an explosion.”

Told the quake was of 2.4 magnitude, Bies was surprised.

“For that low of a magnitude, we must be really close to the epicenter, because we had quite a jolt here,” she said.

Mandy Fowler, a dispatcher with the Sagadahoc County Sheriff’s Office in Bath, said she felt the earthquake at her home in Woolwich, shortly before 1:30. By the time she arrived at work, she said, calls had begun pouring in.

“I felt it at my house in Woolwich,” Fowler said. “It shook my whole house.”

Fowler said shortly after 2 p.m. that she had taken no damage reports. Papa Jack Towing of Bath reported that the quake knocked items off the shelves of its building, she said.

Lynette Eastman, town administrator in Woolwich, found nothing “mild” about the tremblor.

“I like the way they call it ‘mild,’” Eastman wrote in an email. “Everything is relative isn’t it?  This would be mild for California.”

Eastman said she received many calls in her office.

“Frankly it brought the three of us women out of our chairs and out the side door,” she said. “It took a few minutes to figure out what happened. We definitely felt it shake this building and then there was another small aftershock.”

Liia Becker, of Georgetown, posted on the Times Record Facebook page she thought her furnace had exploded.

Temblors are not unknown in the Mid-coast.

On Oct. 16, 2012, a 4.0-magnitude quake near Hollis Center was felt throughout New England, including locally. While that quake was larger, Monday’s was closer.

A 4.0 shaker was felt in Bath on April 17, 1979, according to the Maine Geological Survey.

The largest earthquake recorded in the state between 1747 and 1992 was near Eastport in 1904, with a “modified Mercalli intensity” estimated at VII, according to the Survey.

The largest accurate measurement was on June 15, 1973, from an earthquake just on the Quebec side of the border from Oxford County, with a Richter magnitude of 4.8.

In 2006, a series of earthquakes near Acadia National Park moved boulders onto the famed carriage trails there.

“Most Maine earthquakes are of small magnitude,” the Maine Geological Survey said on its website. “Many are too small to feel. No Maine earthquake has caused significant damage. The persistent activity, however, indicates that some crustal deformation is occurring and that a larger earthquake cannot be ruled out.”