The quake was felt in the Edgewood area, where Aegis news staff members were conducting an interview at the middle school.
"The entire gym at Edgewood Middle just shook for like 10 seconds," Aegis photographer Nicole Munchel wrote in a text message.
The earthquake interrupted bail review hearings taking place at the Mary Risteau District Court building in Bel Air and became the talk of the building.
As the building shook, a corrections officer at the Harford County Detention Center in contact with the court through closed circuit television system said the jail was also shaking. Once the tremors subsided, hearings continued as usual.
There was an emergency call in Havre de Grace for a possible gas leak.
Harford County Public Schools Manager of Communications Teri Kranefeld confirmed in an e-mail Tuesday afternoon that a relief valve at Havre de Grace High School was released during the earthquake, causing a gas leak at the school.
"Everything has now been secured," she added.
Cecil County Public Schools posted a message on its website Tuesday evening saying the superintendent had decided to postpone Wednesday's scheduled first day of school until Thursday, "in order to allow further time to inspect our school facilities." School offices were also closed Wednesday.
By 2:40 p.m. Tuesday, people were walking around on Main Street in Bel Air as if nothing had happened.
The tremor was felt from Virginia, across Maryland and as far north as New England, according to initial news reports.
Former Aegis news staff member Rachel Konopacki, on a business trip in Dover, Pa., about 75 miles northwest of Bel Air, said not everyone, including her, was immediately aware of the quake.
"One person in five felt the floor shake a little," Konopacki wrote in a text message. "The rest of us didn't feel a thing."
According to the NGS, the quake was centered near Louisa, Va., in the 23093 ZIP Code, map coordinates 37.9750, -77.9690. The area is in the center of the state, northwest of Richmond and east of Charlottesville.
Some cellular phone service appeared to have been disrupted in the Bel Air area for an hour or more after the quake was felt.
E-mail messages flooding in from http://www.baltimoresun.com and http://www.exploreharford.com said the quake was felt around the Baltimore region, including Columbia, Ellicott City, Catonsville, Towson and Timonium.
"All Maryland State Police barracks throughout the state reported feeling the quake, but as of 2:30 p.m., they have received no reports of serious injuries," stated a news release from state police headquarters in Pikesville.
The same was true of MSP Bel Air Barrack. As of 3:20 p.m. Tuesday, Maryland State Police with the Bel Air Barrack had no reports of damage or injury related to the quake.
Rich Gardiner, spokesman for the Harford Volunteer Fire and EMS Association said everything was quiet and knew of no incidents taking place.
Spokespersons at Harford Memorial Hospital in Havre de Grace and the Aberdeen Police Department, likewise, said everything appeared fine.
Craig warns of aftershocks