FRANKLIN COUNTY — Inquiries were made about an explosive sound on Nov. 19 which rocked much of county from Farmington to Kingfield. Curious residents called local dispatchers between 5:30 and 6 p.m. to try to figure out what had exploded.

The only response dispatchers could suggest was that the loud rumblings and sudden boom must have come from military aircraft flying overhead. The boom, some residents said, rattled their windows or sounded like a tree falling on their home.

The next day after contacting several military bases that fly missions in the Military Operations Area known as Condor, none took responsibility including the two Air National Guard bases in Massachusetts and Vermont.

Brook Davis, public affairs official for the Eastern Air Defense Sector called last week after investigating the incident. EADS monitors the air space on the east coast as well as all training missions in Condor.

According to her records, there were two F-16s in flight over Farmington and Kingfield at the time of the incident. These jets belonged to the 158th Fighter Wing of the Air National Guard based in Burlington, Vt. F-16s, she said, have the single tail; F-15s have two tails.

Lt. Lloyd Goodrow of the Burlington ANG initially said he did not have jets out that night, but that response was based on inquiring if three jets were in the area.

On Monday, when it was confirmed to be the 158th jets, he said the “three jets” was the basis of his response and felt bad he gave misleading information. “I feel really bad about my answer to the question.”

Pilots that night all recorded nonsonic missions in a practice scramble conducted overhead. “I don’t know how to attribute the complaints of a sonic boom,” he said.

Pilots must log if they ever break the sound barrier and they did not that evening, he said.

“Unless some highly unusual thing happened with atmospheric conditions, I don’t know what to say. All I can say is our pilots did not record it,” Goodrow explained.

“I think it’s fair to say that if the pilots did break the sound barrier, they were not aware of it. This is something that we’re very sensitive of.”

Supersonic speeds are typically done over seas and not land, he said. “Is it a populated area,” he asked with concern. “I have no idea of the type of area that you’re referring to.”

Sonic waves or sonic booms can occur under specific atmospheric conditions when a plane or object travels faster then the speed of sound or 750 miles per hour or faster at sea level.