Second Sonic Boom over the US

The first sonic boom was in South Carolina. Then, less than three days later there's been another over the east coast of the US, this time in Massachusetts, north of Boston. Weird, huh.

Sonic Boom Over South Carolina

I wonder what this was? A sonic boom was heard over the South-east United States, about four hours before the Blue Origin rocket blew up in Florida. The most likely explanation is that it was a meteor, but it's still fascinating.