Seismic Noise by Wind Farms: A Case Study from the Virgo Gravitational Wave Observatory, Italy

Seismic-noise-by-wind-farms-PDF-report

Istituto Nazionale di Geofisica e Vulcanologia, Pisa, Italy

We present analyses of the noise wave field in the vicinityof Virgo, the Italian–French gravitational wave observatorylocated close to Pisa, Italy, with special reference to the vibrations induced by a nearby wind farm. The spectral contributionof the wind turbines is investigated using (1) onsite measurements,(2) correlation of spectral amplitudes with wind speed,(3) directional properties determined via multichannelmeasurements, and (4) attenuation of signal amplitude withdistance. Among the different spectral peaks thus discriminated,the one at frequency 1.7 Hz is associated with the greatest power, and under particular conditions it can be observed at distances as large as 11 km from the wind farm.

The spatialdecay of amplitudes exhibits a complicated pattern, which weinterpret in terms of the combination of direct surface wavesand body waves refracted at a deep ({approx}800 m) interface betweenthe Plio-Pleistocenic marine, fluvial, and lacustrine sedimentsand the Miocene carbonate basement. We develop a model for wave attenuation that allows determining the amplitude of the radiationfrom individual turbines, which is estimated on the order ofFormula for wind speeds over the8–14 m/s range. On the basis of this model, we then developa predictive relationship for assessing the possible impactof future wind farm projects.

Gilberto Saccorotti and Davide Piccinini

Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa Via U, della Faggiola, 32-56126, Pisa, Italy saccorotti@pi.ingv.itdavide.piccinini@ingv.it

Léna Cauchie*

UCD School of Geological Sciences, University College Dublin, Belfield, Dublin 4, Ireland lena.cauchie@gmail.comIrene Fiori European Gravitational Observatory, Via E. Amaldi 56021, S.Stefano a Macerata, Cascina (PI), Italy irene.fiori@ego-gw.it

*Also at Istituto Nazionale di Geofisica e Vulcanologia, Pisa, Italy

7 thoughts on “Seismic Noise by Wind Farms: A Case Study from the Virgo Gravitational Wave Observatory, Italy

  1. Those are good links, Margaret, especially the second one illustrating the sensitivity of pike to low frequencies. Lake St Clair is one of the greatest sports fisheries for muskies (the biggest member of the pike family) in the world = BIG $$$$$. Lake Erie is tops for walleye fishing and although walleye aren’t related to pike, they likely have the same aversion to low frequencies.

  2. We should be banding together and paying for a more effective TV ad than the CHEX ad.
    Pointing out the corruption , who stands to gain , the cost and what we look foward to if we continue with their BS…….

  3. I agree with you Ernest.

    Our grass roots groups should be pulling our finances together and putting our story on the air waves. It’s the only way to make the Ontario Libs stop ignoring us. There are 28 rural Liberal seats. Direct our campaign in those areas and make an impact.

    I urge any group who is considering tv as an option to contact Manvers Wind Concerns and we can work together to get more rural folks educated.

  4. Well we are on board.
    I think we have to accept that people don’t care about health issues , they don’t care if your property values drop , they don’t care if you live in the shadows of windturbines and most don’t care if all of Ontario is covere in them.
    But,
    They care about being lied to , manipulated , seeing their costs rise .
    I believe the ad should focus on the money trail , who is making a killing on their backs , how it will affect their lives and how much more they will have to pay for electricity and the real reasons why.
    “We are mad as hell and aren’t going to take it anymore”

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