Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1860733 | Physics Letters A | 2016 | 5 Pages |
Abstract
Among the first attempts to detect gravitational waves, the seismic approach pre-dates the digital era. Major advances in computational power, seismic instrumentation and in the knowledge of seismic noise suggest to reappraise its potential. Using the whole earth as a detector, with the thousands of digital seismometers of seismic global networks as a single phased array, more than two decades of continuous seismic noise data are available and can be readily sifted at the only cost of (a pretty gigantic) computation. Using a subset of data, we show that absolute strains hâ²10â17 on burst gravitational pulses and hâ²10â21 on periodic signals may be feasibly resolved in the frequency range 0.1-10 Hz, only marginally covered by current advanced LIGO and future eLISA. However, theoretical predictions for the largest cosmic gravitational emissions at these frequencies are a few orders of magnitude lower.
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Authors
Francesco Mulargia, Alexander Kamenshchik,