Boston residents report feeling their homes shake after hearing a loud, mysterious “boom,” prompting an investigation by local police. Multiple residents contact authorities following the noise, leading to an influx of 911 calls, according to the report. Officers are probing what caused the sound and the reported vibrations. The incident is described as unusual, with police working to determine whether the boom is linked to a specific event or source. Authorities have not publicly confirmed the cause. Residents’ accounts indicate the impact was strong enough to rattle buildings, though details such as timing, exact location, and any potential damage are not specified in the available summaries. The investigation remains ongoing as police assess calls and gather information. No additional confirmed findings, injuries, or specific explanations are reported in the provided material.