2020
DOI: 10.5194/angeo-2019-165
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From the Sun to the Earth: August 25, 2018 geomagnetic storm effects

Abstract: Abstract. On August 25, 2018 the interplanetary counterpart of the August 20, 2018 Coronal Mass Ejection (CME) hit the Earth, giving rise to a strong G3 geomagnetic storm. We present a description of the whole sequence of events from the Sun to the ground as well as a detailed analysis of the observed effects on the Earth's environment by using a multi instrumental approach. We studied the ICME propagation in the interplanetary space up to the analysis of its effects in the magnetosphere, ionosphere and at gro… Show more

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Cited by 9 publications
(10 citation statements)
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“…The first detection of changes in ionospheric parameters (e.g., F region critical frequency—foF2) associated to the Alaskan earthquake was reported in 1 . In general, it is well known that the ionosphere is influenced from above by the solar activity, leading to the so-called solar wind-magnetosphere-ionosphere coupling 2 5 . On the other hand, the ionospheric medium can be influenced from below by atmospheric waves generated in the neutral atmosphere 6 .…”
Section: Introductionmentioning
confidence: 99%
“…The first detection of changes in ionospheric parameters (e.g., F region critical frequency—foF2) associated to the Alaskan earthquake was reported in 1 . In general, it is well known that the ionosphere is influenced from above by the solar activity, leading to the so-called solar wind-magnetosphere-ionosphere coupling 2 5 . On the other hand, the ionospheric medium can be influenced from below by atmospheric waves generated in the neutral atmosphere 6 .…”
Section: Introductionmentioning
confidence: 99%
“…As already noticed by Astafyeva et al. (2020), the CME structure arrived on the Earth at 02:45 UT on 25 August without providing the classical signature of a Sudden Storm Commencement on the SYMH (see also Piersanti et al., 2020, for details), that during the day reveals rather the signature of the magnetospheric compression due to the increased P sw . This effect can also be seen in the correspondence among the three P sw peaks (at about 08:30, 11:00, and 13:20 UT) during 25 August and the peaks of SYMH right before the main phase of the storm.…”
Section: Resultsmentioning
confidence: 63%
“…These also trigger the oscillations found in J h , with a similar impact on both hemispheres. During this period, the SYMH time profile shows substorm‐like signatures that have been hypothesized to be driven by the effect of a corotating interaction tegion (CIR) (Piersanti et al., 2020], and the most significant variations of the EEF linked to the PPEF take place. The recovery phase of the storm is featured by SW speed higher than about 400 km/s and oscillations of IEF/ B z that correspond to meaningful oscillations in the heating activity, quite symmetrically on the polar caps of both hemispheres: indeed, CIR‐driven geomagnetic storms are able to induce relativistic particle acceleration, enhanced magnetospheric convection and ionospheric heating (Pokhotelev et al., 2009).…”
Section: Resultsmentioning
confidence: 99%
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“…They also provide a detailed measure of the intensity of the physical reasons [3]. One of the space weather impact aspects, namely, on electrical networks, was extensively studied not only in North America [4,5] and Scandinavia [6][7][8], but also in Europe: in United Kingdom [9], Spain [10], Greece [11], Italy [12,13], Austria [14], the Czech Republic [15,16], and finally, by us, in Poland [17][18][19][20].…”
Section: Introductionmentioning
confidence: 99%