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Akademický článek

Forecasting Kp from solar wind data: input parameter study using 3-hour averages and 3-hour range values

Autor: Wintoft Peter, Wik Magnus, Matzka Jürgen, Shprits Yuri

Publikováno v: Journal of Space Weather and Space Climate, Vol 7, p A29 (2017)

We have developed neural network models that predict Kp from upstream solar wind data. We study the importance of various input parameters, starting with the magnetic component Bz, particle density n, and velocity V and then adding total field B and

Externí odkaz: https://doaj.org/article/a9e303abd81f42ce91e0c1fa9bb8234b

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Akademický článek

Solar wind driven empirical forecast models of the time derivative of the ground magnetic field

Autor: Wintoft Peter, Wik Magnus, Viljanen Ari

Publikováno v: Journal of Space Weather and Space Climate, Vol 5, p A7 (2015)

Empirical models are developed to provide 10–30-min forecasts of the magnitude of the time derivative of local horizontal ground geomagnetic field (|dBh/dt|) over Europe. The models are driven by ACE solar wind data. A major part of the work has be

Externí odkaz: https://doaj.org/article/50923305dc564eb887b9bf54ddadd216

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Akademický článek

Regional estimation of geomagnetically induced currents based on the local magnetic or electric field

Autor: Viljanen Ari, Wintoft Peter, Wik Magnus

Publikováno v: Journal of Space Weather and Space Climate, Vol 5, p A24 (2015)

Previous studies have demonstrated a close relationship between the time derivative of the horizontal geomagnetic field vector (dH/dt) and geomagnetically induced currents (GIC) at a nearby location in a power grid. Similarly, a high correlation exis

Externí odkaz: https://doaj.org/article/073fdd8b8728431db3111ad7399c0d06

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Akademický článek

Geomagnetically induced currents in Europe

Autor: Viljanen Ari, Pirjola Risto, Prácser Ernö, Katkalov Juri, Wik Magnus

Publikováno v: Journal of Space Weather and Space Climate, Vol 4, p A09 (2014)

Statistics of geomagnetically induced currents (GIC) in the European high-voltage power grids based on 1-min geomagnetic recordings in 1996–2008 and on 1-D models of the ground conductivity have been derived in the EURISGIC project (European Risk f

Externí odkaz: https://doaj.org/article/3c461853204f4addb5725274ebe8c12b

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Akademický článek

Continental scale modelling of geomagnetically induced currents

Autor: Sakharov Yaroslav, Prácser Ernö, Ádám Antal, Wik Magnus, Pirjola Risto, Viljanen Ari, Katkalov Juri

Publikováno v: Journal of Space Weather and Space Climate, Vol 2, p A17 (2012)

The EURISGIC project (European Risk from Geomagnetically Induced Currents) aims at deriving statistics of geomagnetically induced currents (GIC) in the European high-voltage power grids. Such a continent-wide system of more than 1500 substations and

Externí odkaz: https://doaj.org/article/2fe621e1e10c4c3aaa888b7833339f44

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