English

# Item

ITEM ACTIONSEXPORT

Released

Journal Article

#### Improving the Robustness of the Advanced LIGO Detectors to Earthquakes

##### MPS-Authors
/persons/resource/persons231145

Mukund,  N.
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons206562

Bode,  N.
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

Booker ,  P
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons231131

Liu,  J.
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons231141

Meylahn,  F.
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons40511

Willke,  B.
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

##### External Ressource
No external resources are shared

2007.12847.pdf
(Preprint), 9KB

##### Supplementary Material (public)
There is no public supplementary material available
##### Citation

Schwartz, E., Pele, A., Warner, J., Lantz, B., Betzwieser, J., Dooley, K. L., et al. (2020). Improving the Robustness of the Advanced LIGO Detectors to Earthquakes. Classical and quantum gravity, 37(23): 235007. doi:10.1088/1361-6382/abbc8c.

Cite as: http://hdl.handle.net/21.11116/0000-0007-7DA6-2
##### Abstract
Teleseismic, or distant, earthquakes regularly disrupt the operation of ground--based gravitational wave detectors such as Advanced LIGO. Here, we present \emph{EQ mode}, a new global control scheme, consisting of an automated sequence of optimized control filters that reduces and coordinates the motion of the seismic isolation platforms during earthquakes. This, in turn, suppresses the differential motion of the interferometer arms with respect to one another, resulting in a reduction of DARM signal at frequencies below 100\,mHz. Our method greatly improved the interferometers' capability to remain operational during earthquakes, with ground velocities up to 3.9\,$\mu \mbox{m/s}$ rms in the beam direction, setting a new record for both detectors. This sets a milestone in seismic controls of the Advanced LIGO detectors' ability to manage high ground motion induced by earthquakes, opening a path for further robust operation in other extreme environmental conditions.