and it won't be recorded
because the source is something
that is not supposed to exist.

There are underground tunnels
which have trains that run on
magnetic tracks that transport
personnel and supplies under
the surface to other locations.

There is a tunnel entrance just
outside Charlotte, NC.

This tunnel connects Charlotte
with Washington DC.

Every time the train reaches
supersonic speeds, it shakes
the earth above it.

This is what you are hearing
and it will not be recorded
on any seismic listening device.

And they will deny any existence
of such a contraption.