Investigation of the Geoeffectiveness of Disk-Centre Full-Halo Coronal Mass Ejections

Ameri, Dheyaa; Валтонен, Э.

doi:10.1007/s11207-017-1102-7

Cited by 11 publications

(8 citation statements)

References 43 publications

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“…In contrast, the CME-dominant acceleration is expected when CMEs faster than the local Alfven speed are formed (e.g., Klein and Trottet, 2001), although the median value for the CME speed in the CME-driven sample is the same as in the Flare-driven category. In addition, halo-CMEs have the potential to be geoeffective (Ameri and Valtonen, 2017). Interestingly, the flares accompanying these CMEs are of larger flare class (M2.7) but are more gradually rising (median value of 23 min), compared to the Flare-category.…”

Section: Discussionmentioning

confidence: 99%

Solar radio bursts: Implications to the origin of in situ particles

Miteva¹

2018

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The significance of the solar radio burst signatures for the solar energetic particle (SEP) classification is investigated in the current report. The solar radio bursts associated with the proton-producing solar flares and coronal mass ejections are usually of types II, III and IV. Based on the solar radio burst occurrences in different wavelength ranges, several categories for the SEP origin are adopted. This study evaluates the statistical differences in the flare and CME event samples related to each of these proton categories: flare-driven, CME-driven and mixed-contribution.

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Section: Discussionmentioning

confidence: 99%

Solar radio bursts: Implications to the origin of in situ particles

Miteva¹

2018

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“…So some questions come up naturally: what kind of CMEs can arrive at the Earth and when will such CMEs arrive? Previous results suggest that the three-dimensional parameters of CMEs, such as source location [21][22][23][24][25][26][27][28], angular width [22,28,29], and propagation angle [22,28,29] as well as the initial velocity [21,22,[24][25][26][27][28][29][30][31], are important factors in determining whether and when they arrive at Earth.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, to study what kind of CMEs are Earth-impacting, Earth-directed or frontside halo CMEs are obviously of interest. Many studies on Earth-impacting CMEs or geoeffective CMEs have focused on such CMEs [21,23,25,26,28,30]; however, sometimes an Earth-impacting CME is not necessarily a halo. Therefore, there are some studies [24] that analyze the characteristics of Earth-impacting or geoeffective CMEs and obtain some necessary but not sufficient conditions for Earth-impacting CME forecasting.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Parameters of the Earth-Impacting CMEs Based on the GCS Model

et al. 2021

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When a CME arrives at the Earth, it will interact with the magnetosphere, sometimes causing hazardous space weather events. Thus, the study of CMEs which arrived at Earth (hereinafter, Earth-impacting CMEs) has attracted much attention in the space weather and space physics communities. Previous results have suggested that the three-dimensional parameters of CMEs play a crucial role in deciding whether and when they reach Earth. In this work, we use observations from the Solar TErrestrial RElations Observatory (STEREO) to study the three-dimensional parameters of 71 Earth-impacting CMEs from the middle of 2008 to the end of 2012. We find that the majority Earth-impacting CMEs originate from the region of [30S,30N] × [40E,40W] on the solar disk; Earth-impacting CMEs are more likely to have a central propagation angle (CPA) no larger than half-angular width, a negative correlation between velocity and acceleration, and propagation time is inversely related to velocity. Based on our findings, we develop an empirical statistical model to forecast the arrival time of the Earth-impacting CME. Also included is a comparison between our model and the aerodynamic drag model.

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“…Geomagnetic storms are associated with Earth directed coronal mass ejections (CMEs). CMEs originating from regions close to the central meridian of the Sun and directed toward Earth cause the most severe geomagnetic storms (Gopalswamy et al (2007), Ameri, & Valtonen (2017)).…”

Section: Introductionmentioning

confidence: 99%

Study of solar flares associated with Geoeffective CMEs

Choithani¹,

Jain²,

Pallamraju

2018

Proc. IAU

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We study 30 solar flare events associated with coronal mass ejections (CMEs) that produced geomagnetic storms as measured in Dst index. Our study reveals that the magnitude of Dst index is significantly associated with maximum solar wind speed, peak of Bz component of the IMF and the product of peak Bz and solar wind speed (minimum and maximum). From our investigations, it can be inferred that CMEs travel with higher speed in the beginning and their speed reduces as they reach L1 location.

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Investigation of the Geoeffectiveness of Disk-Centre Full-Halo Coronal Mass Ejections

Cited by 11 publications

References 43 publications

Solar radio bursts: Implications to the origin of in situ particles

Solar radio bursts: Implications to the origin of in situ particles

Three-Dimensional Parameters of the Earth-Impacting CMEs Based on the GCS Model

Study of solar flares associated with Geoeffective CMEs

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