Penrose Erebons are unstable micro Higgs black holes in-and outside the LIGO beam splitters.

See image: Composite rigid transformable string models, based on 3x internal-90 degr. step rotation of the Axion-Higgs Torus made of primordial matter.
All Photons (1xgraviton, 2x electric-,2x mgnetic and 1x general x-gamma-ray photon) and two Fermions, are transformed direct out of the massless Axion/Higgs ring, by internal hinge rotation over 90 degree steps.
Electric Dark Matter Black Holes (EDMBHs or EREBONS (Penrose solution for correlated LIGO noise !) are formed by 3 or 4 photon knots (ball lightning) building up by ring connection systems like Olimpic rings.
Neutrinos are single transformed photons or fermions.
The basic rigid transformable Axion string Torus with aspect ratio (=7) and 1x splitting and 3x hinges made of primordial matter, according to Quantum FFF Theory.
The LIGO problem.
So I assume that the correlated LIGO noise problem is solved by the decay with gravitational effects of small Erebons also called EDMBHs.
EDMBHs could be created by the continuous EM  Lightning interference process on earth/planets and the solar flares (gamma rays) , but even inside the beam splitters of the LIGO apparatuses, which seems to be a logic proposal for the bulk of UN-correlated noise between the two LIGO locations.
As a consequence, these beam splitters should show short lifetimes, by the little defects inside the glass burnt away by decaying Higgs knots. of 126-375-750 GeV.

However There is more discussion on "correlated noise" between the Hanford and Livingstone detector, which can not be related to beamsplitter damage by decaying Higgs knots, see: Penrose: Correlated “noise” in LIGO gravitational wave signals: an implication of Conformal Cyclic Cosmology

https://arxiv.org/ftp/arxiv/papers/1707/1707.04169.pdf

According to Quantum FFF Theory, around stars (our sun) and even planets a continuous stream of magnetic interference based unstable Dark matter black hole Higgs particles ( or Erebons, masses: 126-750 GeV  and more)  are created which direct decay accompanied by small gravitational "noise"?

Future research however should concentrate on time shifts between the correlated LIGO events, which seem to show "nearly the same time shifts for the three GW events reported to date." . indicating a possible correlation with the main black hole merger location.
see:  On the time lags of the LIGO signals

https://arxiv.org/pdf/1706.04191.pdf

"It is striking that these correlations are maximized by applying nearly the same time shifts as found for the GW events themselves — for all three GW events reported to date."