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On Multiple Type II Bursts and Coronal Mass Ejections

DOI: 10.5923/j.astronomy.20120103.01

Keywords: Sun, Coronal Mass Ejections, Radio Burst, Solar Cycle

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Abstract:

We have investigated 42 multiple type II events observed during the period 1997-2007 for the complete solar cycle 23 recorded by WAVES/WIND instrument and point out that the average speed of associated CMEs is 1311 km/s and 57% of CMEs have their widths larger than 200 degree or they are halo CMEs. The mean of starting and ending frequencies is 9.09 MHz and 1.82 MHz, respectively. The linear correlation factor is 0.052 which implies that starting and ending frequencies have no correlation.

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