Abstract
In this Letter, we present an upper limit of on an isotropic stochastic gravitational-wave (GW) background integrated over a year in the frequency range 0.05–1 Hz, which improves current upper limits from high-precision laboratory experiments by about 9 orders of magnitude. The limit is obtained using the response of Earth itself to GWs via a free-surface effect described more than 40 years ago by Dyson. The response was measured by a global network of broadband seismometers selected to maximize the sensitivity.
- Received 13 January 2014
DOI:https://doi.org/10.1103/PhysRevLett.112.101102
© 2014 American Physical Society
Synopsis
Earth as Giant Gravitational Wave Detector
Published 13 March 2014
Seismographic data place new, stronger limits on the amount of gravitational wave energy in the Universe.
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