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Large non-radial propagation of a coronal mass ejection on 2011 January 24
Mierla, M.; D'Huys, E.; Stenborg, G. +6 more
Understanding the deflection of coronal mass ejections (CMEs) is of great interest to the space weather community because of their implications for improving the prediction of CME. This paper aims to shed light into the effects of the coronal magnetic field environment on CME trajectories. We analyze the influence of the magnetic environment on th…
Cut-off features in interplanetary solar radio type IV emission
Pohjolainen, Silja; Talebpour Sheshvan, Nasrin
Solar radio type IV bursts can sometimes show directivity, so that no burst is observed when the source region in located far from the solar disk center. This has recently been verified also from space observations, at decameter wavelengths, using a 3D-view to the Sun with STEREO and Wind satellites. It is unclear whether the directivity is caused…
Analysis of a long-duration AR throughout five solar rotations: Magnetic properties and ejective events
Ugarte-Urra, Ignacio; Mandrini, Cristina H.; Cremades, Hebe +4 more
Coronal mass ejections (CMEs), which are among the most magnificent solar eruptions, are a major driver of space weather and can thus affect diverse human technologies. Different processes have been proposed to explain the initiation and release of CMEs from solar active regions (ARs), without reaching consensus on which is the predominant scenari…
On extreme space weather events: Solar eruptions, energetic protons and geomagnetic storms
Miteva, Rositsa
The purpose of this study is to identify the extreme space weather events in the available satellite and ground-based databases and to relate them to other associated or accompanied solar activity events. Solar flares, coronal mass ejections, energetic protons and geomagnetic storms are selected among all manifestations/consequences of solar activ…
Latitudinal distribution of solar coronal active regions
Chargeishvili, B. B.; Maghradze, D. A.; Japaridze, D. R. +3 more
We studied the cyclic evolution of the latitudinal distribution of solar coronal active regions based on daily images from SOHO EIT for the period 1995-2017. Fully automated software was used, which included the following steps: initial preparation of images in the data series, normalization of histograms and correction of limb brightening, segmen…