Simulation of underground gravity gradients from stochastic seismic fields
Abstract
We present results obtained from a finite-element simulation of seismic displacement fields and of gravity gradients generated by those fields. The displacement field is constructed by a plane-wave model with a 3D isotropic stochastic field and a 2D fundamental Rayleigh field. The plane-wave model provides an accurate representation of stationary fields from distant sources. Underground gravity gradients are calculated as the acceleration of a free test mass inside a cavity. The results are discussed in the context of gravity-gradient noise subtraction in third generation gravitational-wave detectors. Error analysis with respect to the density of the simulated grid leads to a derivation of an improved seismometer placement inside a 3D array which would be used in practice to monitor the seismic field.
Additional Information
© 2009 The American Physical Society. Received 17 September 2009; published 1 December 2009. We gratefully acknowledge the support of LIGO and thank Albrecht Rüdiger for his thorough scrutiny of this paper.Additional details
- Eprint ID
- 17233
- DOI
- 10.1103/PhysRevD.80.122001
- Resolver ID
- CaltechAUTHORS:20100120-094201789
- Created
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2010-01-25Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field