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Geoeffective events through solar cycles

Published online by Cambridge University Press:  27 November 2018

Brigitte Schmieder  and
Guillaume Aulanier
Brigitte Schmieder
Affiliation:
Observatoire de Paris, LESIA, PSL Research University, 5 Place Janssen, 92195, Meudon, France email: [email protected]
Guillaume Aulanier
Affiliation:
Observatoire de Paris, LESIA, PSL Research University, 5 Place Janssen, 92195, Meudon, France email: [email protected]
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Abstract

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Extreme solar storms are well known in the historical databases. Since the modern era, it has been possible to associate clearly geomagnetic disturbances with solar events (flares, SEP, CMEs). In the recent solar cycles the geoeffective events (number and strength) are decreasing. As an example, in the 2002 maximum activity year, we present how many flares, and CMEs were geoeffective. Based on observations and simulations, we discuss on the size of sunspots and the field strength to get more energetic flares (> 1032 ergs) in the near future.

Keywords

Sun: Coronal Mass Ejections (CMEs)Sun: flaresSolar-terrestrial Relations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S340: Long-term Datasets for the Understanding of Solar and Stellar Magnetic Cycles , February 2018 , pp. 255 - 256
Copyright
Copyright © International Astronomical Union 2018 

References

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