Numerical simulation of currents induced by geomagnetic storms on buried pipelines: an application to the Tierra del Fuego, Argentina, gas transmission route

Favetto, A.; Osella, A.

doi:10.1109/36.739127

Cited by 11 publications

(7 citation statements)

References 8 publications

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“…Relevant timescales were minutes, or only tens of seconds. The obvious relation of these findings to GIC modeling is that it is clear that the widely used simple electrojet model [ Favetto and Osella , 1999; Kappenman et al , 2000; Boteler et al , 2000] is insufficient to produce ground magnetic variations with the complexity in d H / dt seen here. More sophisticated ionospheric current models are required in the computation of realistic estimates of GIC.…”

Section: Study Of the 26 June 1998 Eventmentioning

confidence: 79%

Ionospheric equivalent current distributions determined with the method of spherical elementary current systems

2003

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.[1] The ground magnetic field disturbance caused by ionospheric currents can be represented by equivalent currents placed to the ionospheric plane. Equivalent currents provide valuable information about the ionospheric electrodynamics, and thus they can be used, for example, in studies of space weather, ionosphere-magnetosphere coupling, and the magnetotelluric source effect. We derive equivalent currents by using the spherical elementary current system method. The applicability of the method for the Baltic Electromagnetic Array Research (BEAR) magnetometer array is validated by means of synthetic ionospheric current models and by investigating the goodness of the fit between the modeled and measured ground magnetic field. The applicability of the method for the sparser International Monitor for Auroral Geomagnetic Effects (IMAGE) magnetometer network is also proved. In addition, the combination of the elementary current system method and the complex image method, used for the calculation of the induced electromagnetic fields on ground, is introduced, and the combination of the methods is tested by using geoelectric field data from the BEAR project. Our special interest is in the effects that rapidly varying ionospheric currents have on technological conductor systems at the surface of the Earth due to geomagnetically induced currents. Comparison between equivalent currents and the time derivative vector of the horizontal magnetic field emphasizes the importance of small-scale structures.

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Section: Study Of the 26 June 1998 Eventmentioning

confidence: 79%

Ionospheric equivalent current distributions determined with the method of spherical elementary current systems

2003

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“…Viljanen et al, 1999;Favetto and Osella, 1999;Kappenman et al, 2000;Pulkkinen et al, 2001b). Also, studies have been carried out where the geoelectric field is computed directly from the measured ground geomagnetic field (e.g.…”

Section: Introductionmentioning

confidence: 99%

April 2000 geomagnetic storm: ionospheric drivers of large geomagnetically induced currents

et al. 2003

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Abstract. Geomagnetically induced currents (GIC) flowing in technological systems on the ground are a direct manifestation of space weather. Due to the proximity of very dynamic ionospheric current systems, GIC are of special interest at high latitudes, where they have been known to cause problems, for example, for normal operation of power transmission systems and buried pipelines. The basic physics underlying GIC, i.e. the magnetosphere -ionosphere interaction and electromagnetic induction in the ground, is already quite well known. However, no detailed study of the drivers of GIC has been carried out and little is known about the relative importance of different types of ionospheric current systems in terms of large GIC. In this study, the geomagnetic storm of 6-7 April 2000 is investigated. During this event, large GIC were measured in technological systems, both in Finland and in Great Britain. Therefore, this provides a basis for a detailed GIC study over a relatively large regional scale. By using GIC data and corresponding geomagnetic data from north European magnetometer networks, the ionospheric drivers of large GIC during the event were identified and analysed. Although most of the peak GIC during the storm were clearly related to substorm intensifications, there were no common characteristics discernible in substorm behaviour that could be associated with all the GIC peaks. For example, both very localized ionospheric currents structures, as well as relatively large-scale propagating structures were observed during the peaks in GIC. Only during the storm sudden commencement at the beginning of the event were large-scale GIC evident across northern Europe with coherent behaviour. The typical duration of peaks in GIC was also quite short, varying between 2-15 min.

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“…Further, the GIC index defined in this paper can be derived entirely from geomagnetic field data and does not require knowledge of the Earth's conductivity, ionospheric current geometry and the relevant infrastructure details required for the more accurate simulations of PSPs [Boteler and Seager, 1998;Osella et al, 1998;Favetto and Osella, 1999;Pulkkinen et al, 2001b;Trichtchenko and Boteler, 2002;Fernberg et al, 2007]. The GIC index would be an indicator of space weather activity applicable to both pipeline and power networks.…”

Section: Discussion and Modelingmentioning

confidence: 99%

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2010

Space Weather Quarterly

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Numerical simulation of currents induced by geomagnetic storms on buried pipelines: an application to the Tierra del Fuego, Argentina, gas transmission route

Cited by 11 publications

References 8 publications

Ionospheric equivalent current distributions determined with the method of spherical elementary current systems

Ionospheric equivalent current distributions determined with the method of spherical elementary current systems

April 2000 geomagnetic storm: ionospheric drivers of large geomagnetically induced currents

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