Fort Devens Noise Report, 4/21/17
Military training at Fort Devens is increasing as the weather warms up. Light demolition exercises will result in booms that Harvard residents will likely hear, especially when there is cloud cover. Mortar fire and grenades may also be noisy, depending on weather conditions.
April 21, 22: Light demolition
April 28: MK19 (grenade launcher) qualification fire
April 28, 29, 30: Light demolition
Source: Fort Devens Noise Report, April 2017