A phantom explosion? Big enough to get homeowner attention across the state, but no siesmograph footprint? Wonder if a comet like asteroid hit? 

https://www.yahoo.com/news/mysterious-shaking-loud-explosion-heard-213306685.html

Meanwhile, over the Carolina's more big booms...https://www.charlotteobserver.com/news/state/north-carolina/article239387038.html

starting to wonder if maybe Putin is overflying the US with hypersonics as a scare for the Pentagon??