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Outstanding questions in magnetospheric plasma physics: The pollenzo view
Stepanova, Marina; Hesse, Michael; Delzanno, Gian Luca +6 more
Based on discussions held at a workshop in Bra-Pollenzo, Italy, this paper elaborates upon 19 outstanding questions of plasma physics in the Earth's magnetosphere. The questions are grouped according to (a) driving processes, (b) radiation belt and ring current issues, (c) auroral physics, (d) internal plasma processes, and (e) magnetosphere-ionos…
Chain of responses of geomagnetic and ionospheric storms to a bunch of central coronal hole and high speed stream of solar wind
Gulyaev, R. A.; Gulyaeva, T. L.
Results of analysis of the proxy of Coronal Hole (CH) Power index, Pch, combined with the high speed streams HSS of solar wind for a period from 2011 to 2019 are presented. It is found that the long-term variation of Pch index shows a trend of growing Pch towards the minimum of solar cycle while most of other identities of solar activity tend to d…
On the source region and orientations of nightside auroral arcs
Sergeev, V.; Bondareva, T.; Gilles, D. +1 more
Using large data base of stable auroral arcs observed at Gillam we identified those passes of POES spacecraft which were magnetically conjugate to these arcs. We studied statistically arc locations with respect to the energetic particle isotropy boundaries (IBs), which are the well-known markers of the magnetotail regions. In the dusk and night se…
Source region identification and geophysical effects of stealth coronal mass ejections
Fainshtein, V. G.; Zagainova, Iu. S.; Gromova, L. I. +1 more
We use the example of two Stealth-type coronal mass ejections (stealth CMEs) registered by LASCO C2 on the quiescent Sun on 16 June 2010 and in the active region NOAA 11520 7 July 2012 to demonstrate that these mass ejections emerged in a lower-coronal area where an intense short-term radiation burst was registered in several extreme ultraviolet c…
Estimation of solar EUV flux from TIMED/GUVI data
Zhang, Yongliang; Paxton, Larry J.; Schaefer, Robert
This paper examines the relationships between the integrated solar EUV (26-34 nm and 5-45 nm) flux and the measured radiance in the N2 Lyman-Birge-Hopfield (LBH) 140-150 nm range (LBHS) under sunlit conditions. We find that both the (26-34 nm) and (5-45 nm) solar fluxes are linearly correlated with the daily median LBHS radiances with c…