Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published December 2020 | Published + Submitted
Journal Article Open

Improving the robustness of the advanced LIGO detectors to earthquakes

Schwartz, E. ORCID icon
Pele, A. ORCID icon
Warner, J.
Lantz, B. ORCID icon
Betzwieser, J. ORCID icon
Dooley, K. L. ORCID icon
Biscans, S. ORCID icon
Coughlin, M. ORCID icon
Mukund, N. ORCID icon
Abbott, R.
Adams, C.
Adhikari, R. X. ORCID icon
Ananyeva, A.
Appert, S.
Arai, K. ORCID icon
Areeda, J. S. ORCID icon
Asali, Y.
Aston, S. M.
Austin, C. ORCID icon
Baer, A. M.
Ball, M.
Ballmer, S. W. ORCID icon
Banagiri, S. ORCID icon
Barker, D.
Barsotti, L. ORCID icon
Bartlett, J.
Berger, B. K. ORCID icon
Bhattacharjee, D.
Billingsley, G. ORCID icon
Blair, C. D. ORCID icon
Blair, R. M.
Bode, N. ORCID icon
Booker, P.
Bork, R.
Bramley, A.
Brooks, A. F. ORCID icon
Brown, D. D.
Buikema, A. ORCID icon
Cahillane, C. ORCID icon
Cannon, K. C. ORCID icon
Chen, X.
Ciobanu, A. A. ORCID icon
Clara, F.
Cooper, S. J. ORCID icon
Corley, K. R.
Countryman, S. T. ORCID icon
Covas, P. B.
Coyne, D. C. ORCID icon
Datrier, L. E. H. ORCID icon
Davis, D. ORCID icon
Di Fronzo, C.
Driggers, J. C. ORCID icon
Dupej, P.
Dwyer, S. E. ORCID icon
Effler, A. ORCID icon
Etzel, T.
Evans, M. ORCID icon
Evans, T. M. ORCID icon
Feicht, J. ORCID icon
Fernández-Galiana, Á. ORCID icon
Fritschel, P. ORCID icon
Frolov, V. V.
Fulda, P. ORCID icon
Fyffe, M.
Giaime, J. A. ORCID icon
Giardina, K. D.
Godwin, P.
Goetz, E.
Gras, S.
Gray, C.
Gray, R.
Green, A. C. ORCID icon
Gupta, Anchal ORCID icon
Gustafson, E. K.
Gustafson, R.
Hanks, J.
Hanson, J.
Hardwick, T.
Hasskew, R. K.
Heintze, M. C.
Helmling-Cornell, A. F. ORCID icon
Holland, N. A.
Jones, J. D.
Kandhasamy, S. ORCID icon
Karki, S.
Kasprzack, M. ORCID icon
Kawabe, K. ORCID icon
Kijbunchoo, N. ORCID icon
King, P. J.
Kissel, J. S. ORCID icon
Kumar, Rahul
Landry, M.
Lane, B. B. ORCID icon
Laxen, M. ORCID icon
Lecoeuche, Y. K. ORCID icon
Leviton, J.
Liu, J.
Lormand, M.
Lundgren, A. P.
Macas, R. ORCID icon
MacInnis, M. ORCID icon
Macleod, D. M. ORCID icon
Mansell, G. L.
Márka, S. ORCID icon
Márka, Z. ORCID icon
Martynov, D. V. ORCID icon
Mason, K.
Massinger, T. J. ORCID icon
Matichard, F. ORCID icon
Mavalvala, N. ORCID icon
McCarthy, R.
McClelland, D. E. ORCID icon
McCormick, S.
McCuller, L. ORCID icon
McIver, J. ORCID icon
McRae, T.
Mendell, G.
Merfeld, K.
Merilh, E. L.
Meylahn, F. ORCID icon
Mistry, T.
Mittleman, R.
Moreno, G.
Mow-Lowry, C. M. ORCID icon
Mozzon, S. ORCID icon
Mullavey, A. ORCID icon
Nelson, T. J. N.
Nguyen, P.
Nuttall, L. K. ORCID icon
Oberling, J.
Oram, Richard J.
Osthelder, C.
Ottaway, D. J. ORCID icon
Overmier, H.
Palamos, J. R.
Parker, W. ORCID icon
Payne, E.
Perez, C. J.
Pirello, M. ORCID icon
Radkins, H.
Ramirez, K. E. ORCID icon
Richardson, J. W. ORCID icon
Riles, K. ORCID icon
Robertson, N. A.
Rollins, J. G. ORCID icon
Romel, C. L.
Romie, J. H.
Ross, M. P. ORCID icon
Ryan, K.
Sadecki, T.
Sanchez, E. J.
Sanchez, L. E. ORCID icon
Saravanan, T. R.
Savage, R. L. ORCID icon
Schaetzl, D.
Schnabel, R. ORCID icon
Schofield, R. M. S.
Sellers, D.
Shaffer, T.
Sigg, D. ORCID icon
Slagmolen, B. J. J. ORCID icon
Smith, J. R. ORCID icon
Soni, S. ORCID icon
Sorazu, B. ORCID icon
Spencer, A. P. ORCID icon
Strain, K. A. ORCID icon
Sun, L. ORCID icon
Szczepańczyk, M. J. ORCID icon
Thomas, M.
Thomas, P.
Thorne, K. A. ORCID icon
Toland, K.
Torrie, C. I.
Traylor, G.
Tse, M. ORCID icon
Urban, A. L.
Vajente, G. ORCID icon
Valdes, G. ORCID icon
Vander-Hyde, D. C.
Veitch, P. J. ORCID icon
Venkateswara, K.
Venugopalan, G. ORCID icon
Viets, A. D. ORCID icon
Vo, T.
Vorvick, C. ORCID icon
Wade, M. ORCID icon
Ward, R. L.
Weaver, B. ORCID icon
Weiss, R.
Whittle, C. ORCID icon
Willke, B. ORCID icon
Wipf, C. C.
Xiao, L. ORCID icon
Yamamoto, H. ORCID icon
Yu, H.
Yu, H.
Zhang, L. ORCID icon
Zucker, M. E. ORCID icon
Zweizig, J. ORCID icon


Teleseismic, or distant, earthquakes regularly disrupt the operation of ground–based gravitational wave detectors such as Advanced LIGO. Here, we present 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 μm s⁻¹ 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.

Additional Information

© 2020 IOP Publishing Ltd. Received 30 July 2020; Revised 11 September 2020; Accepted 29 September 2020; Published 5 November 2020. The authors thank the LIGO Scientific Collaboration for access to the data and gratefully acknowledge the support of the United States National Science Foundation (NSF) for the construction and operation of the LIGO Laboratory and Advanced LIGO as well as the Science and Technology Facilities Council (STFC) of the United Kingdom, and the Max Planck Society (MPS) for support of the construction of Advanced LIGO. Additional support for Advanced LIGO was provided by the Australian Research Council. This project was supported by NSF Grants: PHY-1708006 and PHY-1608922. ES acknowledge the LSC FELLOWS program for supporting his research at LIGO Livingston Observatory. LIGO was constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the National Science Foundation and operates under cooperative agreement PHY-1764464 . This paper carries LIGO Document Number LIGO-P2000072.

Attached Files

Published - Schwartz_2020_Class._Quantum_Grav._37_235007.pdf

Submitted - 2007.12847.pdf


Files (4.2 MB)
Name Size Download all
3.0 MB Preview Download
1.2 MB Preview Download

Additional details

August 20, 2023
October 20, 2023