Antarctic Record, 1980 This is an attempt to identify the causes of geomagnetic storms which occurred during a year and a half from January 1977 to June 1978. The assignment of geomagnetic storm causation to appropriate coronal holes or solar flares has been made by ...
Katsuhide MARUHASHI, Takahiroo ISHI
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Active Region Modulation of Coronal Hole Solar Wind [PDF]
The Astrophysical Journal, 2019 Abstract Active regions (ARs) are a candidate source of the slow solar wind (SW), the origins of which are a topic of ongoing research. We present a case study that examines the processes by which SW is modulated in the presence of an AR in the vicinity of the SW source.
Allan R. Macneil +6 more
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SOLAR WIND AND CORONAL BRIGHT POINTS INSIDE CORONAL HOLES
The Astrophysical Journal, 2011 Observations of 108 coronal holes (CHs) from 1998-2008 were used to investigate the correlation between fast solar wind (SW) and several parameters of CHs. Our main goal was to establish the association between coronal bright points (CBPs; as sites of magnetic reconnection) and fast SW. Using in situ measurements of the SW, we have connected streams of
Nina V. Karachik, Alexei A. Pevtsov
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Empirical Forecast of Corotating Interacting Regions and Geomagnetic Storms Based on Coronal Hole Information [PDF]
Journal of Astronomy and Space Sciences, 2009 In this study, we suggest an empirical forecast of CIR (Corotating Interaction Regions) and geomagnetic storm based on the information of coronal holes (CH). For this we used CH data obtained from He I 10830 Å maps at National Solar Observatory-Kitt Peak
Ji-Hye Lee +3 more
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EUV Emission and Scattered Light Diagnostics of Equatorial Coronal Holes as Seen by Hinode/EIS [PDF]
, 2011 Spectroscopic diagnostics of solar coronal plasmas critically depends on the uncertainty in the measured line intensities. One of the main sources of uncertainty is instrumental scattered light, which is potentially most important in low-brightness areas.
Georg Zoidl (90612) +4 more
core +6 more sources
The solar and interplanetary causes of the recent minimum in geomagnetic activity (MGA23): a combination of midlatitude small coronal holes, low IMF BZ variances, low solar wind speeds and low solar magnetic fields [PDF]
Annales Geophysicae, 2011 Minima in geomagnetic activity (MGA) at Earth at the ends of SC23 and SC22 have been identified. The two MGAs (called MGA23 and MGA22, respectively) were present in 2009 and 1997, delayed from the sunspot number minima in 2008 and 1996 by ~1/2–1 years.
B. T. Tsurutani +3 more
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Comparison of solar radio and EUV synoptic limb charts during the present solar maximum [PDF]
, 2016 The present solar cycle is particular in many aspects: it had a delayed rising phase, it is the weakest of the last 100 years, and it presents two peaks separated by more than one year.
de Castro, C. G. Giménes +3 more
core +2 more sources
Recurrent geomagnetic storms and relativistic electron enhancements in the outer magnetosphere: ISTP coordinated measurements [PDF]
, 1997 New, coordinated measurements from the International Solar-Terrestrial Physics (ISTP) constellation of spacecraft are presented to show the causes and effects of recurrent geomagnetic activity during recent solar minimum conditions.
Allen, J. H. +11 more
core +2 more sources
Optoelectronic Interfaces for Nongenetic Modulation of Excitable Tissues. [PDF]
Small MethodsThis review summarizes recent advances in nongenetic optoelectronic technologies for the modulation of excitable biotissues, covering material selection, device design, and working principles, as well as characterization methods. Representative applications in in vitro and in vivo models of the cardiac, central, and peripheral nervous systems are ...
Wang Q, Li J.
europepmc +2 more sources
Solar-Terrestrial Physics, 2023 We have used data from the space telescope SOHO/EIT and the spectrometer VEIS on the Wind spacecraft to compare the solar wind (SW) speed near Earth's orbit with changes in the area of polar coronal holes (CHs) on the Sun during the 1996 solar activity ...
Borisenko A. V., Bogachev S. A.
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