Ground geomagnetic field and GIC response to March 17, 2015 storm

Kozyreva, O.V.; Pilipenko, V.A.; Belakhovsky, V.B.; Sakharov, Y.A.

Авторы: Kozyreva O.V., Pilipenko V.A., Belakhovsky V.B., Sakharov Ya A.
Журнал: Earth, Planets and Space
Том: 70
Год издания: 2018
Издательство: Terra Scientific Publishing Company
Местоположение издательства: Japan
Первая страница: 157
Последняя страница: 169
DOI: 10.1186/s40623-018-0933-2
Аннотация: The St. Patrick’s Day geomagnetic storm on March 17, 2015, has been chosen by the space community for synergetic analysis to build a more comprehensive picture of the storm’s origin and evolution. This storm had an unusually long (~ 17 h) main phase. During this period, many substorm-like activations occurred. These activations resulted in bursts of geomagnetically induced currents (GICs) in power lines on the Kola peninsula. To examine the substorm activations in more detail, we apply various data processing techniques for the world-wide array of magnetometers: the virtual magnetograms, magnetic latitude–local time (MLT) snapshots, and magnetic keograms. These techniques are simple tools that are supplementary to more advanced facilities developed for the analysis of SuperDARN, IMAGE, and CARISMA arrays. We compare the global spatial localization and time evolution of the geomagnetic X-component disturbance and magnetic field variability measured by the Hilbert transform of time derivative dB/dt. The latitude-MLT mapping of these magnitudes shows that very often a region with highest magnetic variability does not overlap with a substorm “epicenter” but is shifted to its poleward or equatorward boundaries. Highest variability of the geomagnetic field, and consequently intense GICs, are caused by medium-scale fast varying structures. There is no one-to-one correspondence between substorm intensity and GIC magnitude.
Добавил в систему: Козырева Ольга Васильевна

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Ground geomagnetic field and GIC response to March 17, 2015 stormстатья

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