Residents across the Metro Richmond area and beyond are reporting hearing a loud explosion early Friday morning.

The question is: what was it?

8News has been contacted by dozens of citizens who experienced the phenomena, with most saying the heard and felt it in the Midlothian area of Chesterfield County, between 8:30 and 9 a.m. However, some have reported hearing the "boom" in Mechanicsville, Colonial Heights, Blackstone and even as far away as Nottoway County.

The noise has been described as an explosion, a deep rumbling, a transformer blowing or even thunder.

8News is checking with a variety of organizations, including the Virginia Tech Seismological Observatory, trying to track down the source of the noise.

If you heard it, email us, at [email protected]

For the latest, watch 8News at 5 and 6.

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