Mysterious ‘Ground Wave’ Traveling Across the Entire US Registered on Seismographs!

An unknown energy wave was picked up travelling through the ground from one end of the US to the other.

Could it have been some covert government activity, some type of strange natural phenomenon or maybe some type of alien activity?

via MrMBB333 – YouTube Channel:

Observed May 12, noticed a strange ground pulse crossing US from East Coast to the far West Coast on seismographs traveling nearly 3000 miles (2800). Actually could follow it, not earthquake energy…something different.