I'd say the other way around, LIGO NEEDS real time seismic (or GPS, according to frequency) data to eliminate what is "seismic noise" for their scope!

I was curious about the spurious seismic signals that cannot be avoided by the system isolation. Recording and subtraction of the seismic signal seem to be ineffective.

Here a PPT with some info about: aLIGO seismic isolation 

https://dcc.ligo.org/public/0057/G1100431/001/G1100431_aLIGOSEIReview.pdf

interesting article on 6 level seismic isolation 

https://eos.org/articles/seeing-the-gravitational-waves-despite-the-seismic-waves?utm_source=rss&utm_medium=rss&utm_content=seeing-the-gravitational-waves-despite-the-seismic-waves&utm_campaign=ealert&utm_source=Eos+Primary+List&utm_campaign=f38ada4605-Weekly_All_Content_Digest&utm_medium=email&utm_term=0_f923f18da4-f38ada4605-308182017

Dear Alexandro,

Yes,

You will understood why I responded this:

Article Gravity a paradym shift in reasoning

Regrads,

Laszlo

LIGO is basically to detect gravitational waves. EQ and other signals are noise in LIGO