Geomagnetic and Ionospheric Responses to the Interplanetary Shock Wave of March 17, 2015

Pilipenko, Vyacheslav; Bravo, M.; Romanova, N. V.; Козырева, О. В.; Самсонов, С. Н.; Sakharov, Ya. A.

doi:10.1134/s1069351318050129

Cited by 19 publications

(18 citation statements)

References 46 publications

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“…In addition, on 26 August 2018, the pattern of the auroral electrojets are consistent with an ICME impacting on the morning side of the magnetosphere. In fact, as expected (Wang et al, 2010;Piersanti and Villante, 2016;Pilipenko et al, 2018), the greater disturbance for both the westward and eastward electrojets are located around 07:00 LT (central panels of Fig. 9).…”

Section: Summary and Discussionsupporting

confidence: 77%

“…This confirms that, despite considerable advances in understanding the drivers of space weather events, there is still room for improvement for their forecasting. It is important to underline that the future capabilities of forecasting if, where and when an event occurs and how intense it will be will depend on our understanding of the physical processes behind the dynamics in near-Earth space (Singer et al, 2013;Pulkkinen, 2015;.…”

Section: Discussionmentioning

confidence: 99%

“…this section, we focused on the ground magnetic response in terms of magnetospheric and ionospheric currents and on the effects that those currents generated on Earth's surface. GICs are one of the main ground effects of space weather events driven by solar activity (Pulkkinen, 2015;Pulkkinen et al, 2017;Carter et al, 2016;. Since GICs represent the end of the space weather chain extending from the Sun to Earth's surface, to complete the description of 25 August 2018 geomagnetic storm, an estimation of the amplitude of geomagnetically induced currents and of the associated risk level, to which power grids have been exposed during this storm, is also presented.…”

Section: Magnetic Effects At Ground Levelmentioning

confidence: 99%

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From the Sun to Earth: effects of the 25 August 2018 geomagnetic storm

et al. 2020

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Abstract. On 25 August 2018 the interplanetary counterpart of the 20 August 2018 coronal mass ejection (CME) hit 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 Earth's environment by using a multi-instrumental approach. We studied the ICME (interplanetary-CME) propagation in interplanetary space up to the analysis of its effects in the magnetosphere, ionosphere and at ground level. To accomplish this task, we used ground- and space-collected data, including data from CSES (China Seismo-Electric Satellite), launched on 11 February 2018. We found a direct connection between the ICME impact point on the magnetopause and the pattern of Earth's auroral electrojets. Using the Tsyganenko TS04 model prevision, we were able to correctly identify the principal magnetospheric current system activating during the different phases of the geomagnetic storm. Moreover, we analysed the space weather effects associated with the 25 August 2018 solar event in terms of the evaluation of geomagnetically induced currents (GICs) and identification of possible GPS (Global Positioning System) losses of lock. We found that, despite the strong geomagnetic storm, no loss of lock had been detected. On the contrary, the GIC hazard was found to be potentially more dangerous than other past, more powerful solar events, such as the 2015 St Patrick's Day geomagnetic storm, especially at latitudes higher than 60∘ in the European sector.

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Section: Summary and Discussionsupporting

confidence: 77%

Section: Discussionmentioning

confidence: 99%

Section: Magnetic Effects At Ground Levelmentioning

confidence: 99%

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From the Sun to Earth: effects of the 25 August 2018 geomagnetic storm

et al. 2020

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“…In addition, on August 26, 2018, the pattern of the polar electrojects are consistent with a ICME impacting on the morning side of the magnetosphere. In fact, as expected (Wang et al, 2010;Piersanti and Villante, 2016;Pilipenko et al, 2018), the greater disturbance for both the westward and eastward electrojects are located around 7:00 LT, (central panels of Figure 9). In the same day, the injection of energetic particles from the magnetotail in the equatorial plane increased the ring current, generating at lower latitudes strong depression of the horizontal field magnitude on the Earth's surface (right panels in Figure 9).…”

Section: Summary and Discussionsupporting

confidence: 76%

From the Sun to the Earth: August 25, 2018 geomagnetic storm effects

Piersanti

Michelis

Moro

et al. 2020

Preprint

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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 ground. To accomplish this task, we used ground and space collected data, including data from CSES (China Seismo Electric Satellite), launched on February 11, 2018. We found a direct connection between the ICME impact point onto the magnetopause and the pattern of the Earth's polar electrojects. Using the Tsyganenko TS04 model prevision, we were able to correctly identify the principal magnetospheric current system activating during the different phases of the geomagnetic storm. Moreover, we analyzed the space-weather effects associated with the August 25, 2018 solar event in terms of evaluation geomagnetically induced currents (GIC) and identification of possible GPS loss of lock. We found that, despite the strong geomagnetic storm, no loss of lock has been detected. On the contrary, the GIC hazard was found to be potentially more dangerous than other past, more powerful solar events, such as the St. Patrick geomagnetic storm, especially at latitudes higher than 60° in the European sector.

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“…However, there might occur impulsive disturbances at high latitudes that cannot be treated this way, because the condition may exist, when the impulse duration is less than the local field line eigenperiod,

τ ≪ T_{A}

. Such a disturbance is a sudden commencement (SC) pulse caused by the impact of an interplanetary shock (IS) on the magnetosphere (Nishimura et al, ; Pilipenko et al, ). Indeed, at high latitudes

T_{A} ≃

5–10 min, which can be longer than an SC impulse with

τ ≃

1–2 min.…”

Section: Introduction: Current/voltage Dichotomy Of Ulf Disturbancesmentioning

confidence: 99%

Incidence of Alfvenic SC Pulse Onto the Conjugate Ionospheres

Pilipenko

Fedorov

et al. 2020

JGR Space Physics

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A circuit analogy for magnetosphere‐ionosphere current systems has two extremes: the voltage generator (when the ground magnetic response is proportional to the ionospheric conductance) and the current generator (when the ground magnetic response practically does not depend on the ionospheric conductance). Nonsteady field‐aligned currents interact with the ionosphere in a different way depending on the ratio between the driver time scale τ and the Alfven field line eigenperiod TA. Sudden Commencement (SC) impulses at high latitudes correspond to the situation when τ≪TA. This case of Alfven pulses propagating independently away from the equatorial plane is analytically examined with the magnetospheric plasma box model with thin asymmetric conjugate ionospheres. At high latitudes the amplitude ratio in conjugate ionospheres in general does not correspond directly to either the current or voltage regimes. Theoretical predictions are supported by examples of typical SC event observations at conjugate magnetometer sites in Greenland and Antarctica during summer and winter periods.

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Geomagnetic and Ionospheric Responses to the Interplanetary Shock Wave of March 17, 2015

Cited by 19 publications

References 46 publications

From the Sun to Earth: effects of the 25 August 2018 geomagnetic storm

From the Sun to Earth: effects of the 25 August 2018 geomagnetic storm

From the Sun to the Earth: August 25, 2018 geomagnetic storm effects

Incidence of Alfvenic SC Pulse Onto the Conjugate Ionospheres

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