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RE: Quietest sun, and yet best propagation! 

Started 1 month ago (2009-11-28 17:34:20)  by g0cas

Hello Dan. There is a well known link between solar activity and HF propagation, but that is only half the story. Geomagnetic activity is the other half. Whether at solar minimum or maximum geomagnetic activity plays an important part in HF and LF bands conditions. Recently the geomagnetic activity as been very quiet with a number of days when the Ap index was zero. Looking at the ...

Forum:  Radio Propagation
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RE: Latest Update 

Started 40 years ago (1969-12-31 23:00:00)  by g0cas

Hello All. Looking at the latest backside images there would seem to be a large sunspot region. Is this where the CME came from??????? 73s de Neil, G0CAS

Forum:  Solar Activity
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RE: Possibly 2 new groups 

Started 1 month, 3 weeks ago (2009-11-05 20:42:55)  by g0cas

Hello. Still waiting for 'SOHO' to update the magnetogram and the MDI images. Both images are from the early hours of this morning (5th). Both plage areas (if they develop into groups) appear by their magnetic footprint and locality to the Sun's equator suggests that they would both belong to the old cycle. A plage area is found on the photosphere in regions of enhanced magnetic fields or ...

Forum:  Solar Activity
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RE: Poll: Have we passed sunspot minimum. 

Started 1 month, 4 weeks ago (2009-11-01 13:08:20)  by g0ord

Insufficient data yet to confirm that a minimum has been reached or an inflection point is present, in my opinion.

Forum:  Solar Activity
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RE: Large New Sunspot Group 

Started 2 months ago (2009-10-25 11:21:15)  by g0cas

Hello. Two close up images of region 1029. It as doubled in size from the 23rd to the 24th. Date Nmbr Location Lo Area Z LL NN Mag Type 091023 1029 N14E14 208 0050 Dsi 05 09 Beta 091024 1029 N14W02 211 0120 Cai 07 11 Beta 73s de Neil, G0CAS.

Forum:  Solar Activity
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RE: Welcome 

Started 1 month, 4 weeks ago (2009-11-02 11:12:58)  by g0cas

Hello All. Well its been 2 weeks now since I started this message board and forum service. I would like to say thanks to the 21 people that have become members, 'welcome aboard'. In it's first two week we have seen the largest sunspot group so far this cycle with a good number of C class solar flares, nine in total. (I must have known). I hope you found the images and short videos useful. ...

Forum:  News
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