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Victor Herrero Radio Astronomy Blog

About the evolution of the Sun active regions

8 Oct 2015, 19:59 UTC
About the evolution of the Sun active regions
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As the days go by, I frequently show details of active region magnetograms images and charts, and other data, for active regions I think may be suspect of initiating the radio events we study.I started studying solar radio emission in 1966, I am not finished yet :) The degree of activity frequently varies much from day to day and is a complex subject studied for many decades.Lidia van Driel-Gesztelyi and Lucie May Green have published last month a "Living Review of Solar Physics" titled:"Evolution of Active Regions" , 98 pages, including 17 pages of references, free to download at:http://solarphysics.livingreviews.org/Articles/lrsp-2015-1/http://solarphysics.livingreviews.org/Articles/lrsp-2015-1/download/lrsp-2015-1Color.pdfSection 6 studies the case of AR 7978, "...subjected to the most comprehensive analysis of any AR..." as it evolved over a 6 month period.Appendix A is a very good summary of Sunspot classifications, including the McIntosh and Hale methods.I leave you repeating their quote from a poem by Laszlo Detre :“  A Solar Physicist’s Lament  ....It looks as if many a sunny dayWill pass along on its wayBefore we solve it all...  "My ignorance is vastHave a wonderful dayVictor :)--------------------------------Solar Dynamics Observatory - Now and Daily - Images Movieshttp://sdo.gsfc.nasa.gov/data/Solar Type Exampleshttp://herrero-radio-astronomy.blogspot.com/2015/07/solar-type-examples.htmlComparison of Cycles 23 and 24 sunspot and coronal mass ejection ...

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