ok , as far as I understand the ligo machines are simply
laser beams in long tunnels that must have sensors used to
detect the movement of the laser caused by gravity
fluctuations.
1) a seismic event on earth would cause a false astronomical
event reading as the ground the ligo is sitting on would tremble.
2) the ligo graphs not too surprisingly look exactly like
a graph of an earthquake.
3) if an seismic event occurred on the earth that was
strong enough to cause a gravity fluctuation of the
earths gravity field then this would also cause false
astronomical event readings.
I haven't yet looked into the possibilities of seismic
events causing a gravity field fluctuation of the earths
gravity field but it seems that it should be a normal occurrence due to the large volume of mass movement
found in a seismic event.
logic is telling me that these machines should be placed
away from the earth if precise measurements are desired
that do not correspond with earth seismic events.
there would be no need for long tunnels.
tiny satellites could be used to measure the location
of the laser beam as it passes through a series of detection
satellites.
the satellites positions could be remotely adjusted to the
desired frequency pattern and desired direction to record
any event that causes light to bend in the cosmos.
