Journal article
Direct observations of surface-wave eigenfunctions at the homestake 3d array
P Meyers, DC Bowden, T Prestegard, VC Tsai, V Mandic, G Pavlis, R Caton
Bulletin of the Seismological Society of America | SEISMOLOGICAL SOC AMER | Published : 2019
DOI: 10.1785/0120190026
Abstract
Despite the theory for both Rayleigh and Love waves being well accepted and the theoretical predictions accurately matching observations, the direct observation of their quantifiable decay with depth has never been measured in the Earth’s crust. In this work, we present observations of the quantifiable decay with depth of surface-wave eigenfunctions. This is done by making direct observations of both Rayleigh-wave and Love-wave eigenfunction amplitudes over a range of depths using data collected at the 3D Homestake array for a suite of nearby mine blasts. Observations of amplitudes over a range of frequencies from 0.4 to 1.2 Hz are consistent with theoretical eigenfunction predictions. They ..
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Grants
Awarded by National Science Foundation
Funding Acknowledgements
The authors are grateful to staff at the Sanford Underground Research Facility and Program for the Array Seismic Studies of the Continental Lithosphere (PASSCAL) for their assistance. Specifically, they thank Jaret Heise, Tom Regan, Bryce Pietzyk, and Jamey Tollefson. Vital technical contributions related to the operation and maintenance of the Homestake 3D seismometer array were made by Terry Stigall. The authors also thank two anonymous reviewers for their helpful comments and suggestions. This work was supported by National Science Foundation (NSF) INSPIRE (Integrated NSF Support Promoting Interdisciplinary Research and Education) Grant PHY1344265. Parts of this research were conducted by the Australian Research Council Centre of Excellence for Gravitational Wave Discovery (OzGrav), through Project Number CE170100004. The authors are grateful for computational resources provided by the Laser Interferometer Gravitational-Wave Observatory (LIGO) Laboratory and supported by National Science Foundation Grants PHY-0757058 and PHY-0823459.