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Imaged on the
17th January 2005, the very large and active sunspot group 720 had already
unleashed several M-class and one X2-class flare towards Earth.
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An image taken on the 31st March
2001. The largest sunspot group was responsible for the burst of superb
auroral displays during the last week of March 2001; 15cm f/4 reflector
used. |
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An
image taken on the 31st October 2001. A few days later the large spot unleashed a coronal
mass ejection which produced colourful auroras on the 5th and 6th of November;
15cm f/4 reflector used. |
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26th
October 2003; a white light image through a Takahashi 3" refractor showing the huge and
complex sunspot groups 10484 and 10486 (lower right). Telescope courtesy of Douglas
Cooper, SAS. 10486 unleashed the 3rd most powerful solar flare ever
recorded, X28, on the 28th Oct. 2003. |