[W4HM Spaceweather] W4HM Discussion Of Daily Solar Space And Geomagnetic Weather

Thomas F Giella W4HM w4hm at tampabay.rr.com
Sun Feb 17 08:55:13 EST 2013


For Saturday February 16, 2013

Solar activity is low as far as the emergence of the number of new sunspot 
groups. Currently there are 3 new un-numbered sunspot groups and 4 existing 
numbered sunspot groups.

Solar activity is low as far as the number of new solar flares, 4 occurred. 
The largest solar flare in magnitude was a very small in size B5.3, which 
occurred at approximately N12E32 and associated with sunspot group #11675.

On Sunday February 17th sunspot group #11675 magnetic complexity is growing 
and at 0031 UTC produced a small in size C1.0 solar flare. Medium size M 
class solar flares are possible.

The daily solar flux index (SFI) has been above 100 for 17 consecutive days, 
currently at 104.5.

The daily sunspot number (SSN) has languished below 100 for 32 consecutive 
days, currently (NOAA) at 75.

The geomagnetic field was other than quiet for one day with the Kp 
(planetary) index in the a 3-4 range, unsettled to active geomagnetic 
conditions. As collected by Potsdam Germany WDC the 3 hour Kp (planetary) 
intervals were 10012331. As collected by NOAA/SWPC the 3 hour Kp (planetary) 
intervals were 10012431.

The Dst ranged between +19 and -14.

Via SOHO the maximum and minimum solar wind values were 275-391.

The maximum background x-ray value was B2.1.

For the latest solar, space & geomagnetic weather data go to 
http://www.wcflunatall.com/nz4o2.htm . For an explanation of how the above 
indices affect MF, HF and VHF radio wave propagation go to 
http://www.wcflunatall.com/nz4o5.htm .

To subscribe to the W4HM Daily MF/HF/6M Radio Wave Propagation Forecast 
Subscription Service go to http://www.wcflunatall.com/propagation.htm or 
http://www.solarcycle24.org .

73 & GUD DX,
Thomas F. Giella, W4HM
Lakeland, FL, USA
w4hm at tampabay.rr.com

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