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Unusual migration of the prominence activities in recent solar cycles

Published online by Cambridge University Press:  06 January 2014

Masumi Shimojo
Masumi Shimojo*
Affiliation:
National Astronomical Observatory of Japan2-21-1, Osawa, Mitaka, Tokyo, 181-8588, Japan email: masumi.shimojo@nao.ac.jp
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Abstract

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We investigated the prominence eruptions and disappearances observed with the Nobeyama Radioheliograph during over 20 years for studying the anomaly of the recent solar cycle. Although the sunspot number of Cycle 24 is smaller than the previous one dramatically, the occurrence rate, size and radial velocity of the prominence activities are not changed significantly. We also found that the occurrence of the prominence activities in the northern hemisphere is normal from the duration of the cycle and the migration of the producing region of the prominence activities. On the other hand, the migration in the southern hemisphere significantly differs from that in the northern hemisphere and the previous cycles. Our results suggest that the anomalies of the global magnetic field distribution started at the solar maximum of Cycle 23.

Keywords

Prominencesolar cyclemicrowave
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S300: Nature of Prominences and their role in Space Weather , June 2013 , pp. 161 - 167
Copyright
Copyright © International Astronomical Union 2013 

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