High-Speed Solar Wind Streams and Geomagnetic Storms During Solar Cycle 24
Autor: | Helen Mavromichalaki, T. Daglis, M. Gerontidou |
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Rok vydání: | 2018 |
Předmět: |
Geomagnetic storm
Physics 010504 meteorology & atmospheric sciences Meteorology Coronal hole Astronomy and Astrophysics Solar cycle 24 01 natural sciences Solar cycle Solar wind Earth's magnetic field Space and Planetary Science Physics::Space Physics 0103 physical sciences Coronal mass ejection Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Interplanetary spaceflight 010303 astronomy & astrophysics 0105 earth and related environmental sciences |
Zdroj: | Solar Physics. 293 |
ISSN: | 1573-093X 0038-0938 |
Popis: | An updated catalog is created of 303 well-defined high-speed solar wind streams that occurred in the time period 2009 – 2016. These streams are identified from solar and interplanetary measurements obtained from the OMNIWeb database as well as from the Solar and Heliospheric Observatory (SOHO) database. This time interval covers the deep minimum observed between the last two Solar Cycles 23 and 24, as well as the ascending, the maximum, and part of the descending phases of the current Solar Cycle 24. The main properties of solar-wind high-speed streams, such as their maximum velocity, their duration, and their possible sources are analyzed in detail. We discuss the relative importance of all those parameters of high-speed solar wind streams and especially of their sources in terms of the different phases of the current cycle. We carry out a comparison between the characteristic parameters of high-speed solar wind streams in the present solar cycle with those of previous solar cycles to understand the dependence of their long-term variation on the cycle phase. Moreover, the present study investigates the varied phenomenology related to the magnetic interactions between these streams and the Earth’s magnetosphere. These interactions can initiate geomagnetic disturbances resulting in geomagnetic storms at Earth that may have impact on technology and endanger human activity and health. |
Databáze: | OpenAIRE |
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