Electromagnetic background noise at L’Aquila Geomagnetic Observatory

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Published: May 9, 2014
DOI: https://doi.org/10.4401/ag-6299
Keywords:
Electromagnetic noise by railways, Man-made electromagnetic noise, Quiet days noise analysis, Man-made disturbances on ULF measurements

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Lucia Santarelli
Istituto Nazionale di Geofisica e Vulcanologia, L’Aquila,
Paolo Palangio
Istituto Nazionale di Geofisica e Vulcanologia, L’Aquila,
Marcello De Lauretis
Università degli Studi dell’Aquila, Dipartimento di Scienze Fisiche e Chimiche, L’Aquila,

Abstract

 

In this paper we analyze the electromagnetic background noise at L’Aquila Geomagnetic Observatory during 2006 and 2007 in the frequency band 1-100 mHz. In this band a pronounced daily variation is observed both in the natural signals as well as in the artificial ones, giving rise to the problem of separating different contributions of very similar morphology. We analyzed periods when the local K index was approximately zero, in correspondence with minimum of the magnetospheric and ionospheric activity. We found that in our area the main source of artificial noise is constituted by the DC electrified railways.


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How to Cite
Santarelli, L., Palangio, P. and De Lauretis, M. (2014) “Electromagnetic background noise at L’Aquila Geomagnetic Observatory”, Annals of Geophysics, 57(2), p. G0211. doi: 10.4401/ag-6299.
Issue
Vol. 57 No. 2 (2014)
Section
Geomagnetism and Paleomagnetism

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