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

Thomas F Giella W4HM w4hm at tampabay.rr.com
Tue Feb 19 09:13:29 EST 2013


For Monday February 18, 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 6 existing 
numbered sunspot groups.

Solar activity is low as far as the number of new solar flares, 2 occurred. 
The largest solar flare in magnitude was a moderate in size C1.0, which 
occurred at approximately N11E16 and associated with sunspot group #11675.

The daily solar flux index (SFI) has been at or above 100 for 19 consecutive 
days, currently at 106.6.

The daily sunspot number (SSN) has languished below 100 for 34 consecutive 
days, currently (NOAA) at 92.

The geomagnetic field was other than quiet for 3 consecutive days with the 
Kp (planetary) index in the 3 range, unsettled geomagnetic conditions.

As collected by Potsdam Germany WDC the 3 hour Kp (planetary) intervals were 
10010113. As collected by NOAA/SWPC the 3 hour Kp (planetary) intervals were 

The Dst ranged between -4 and -25.

Via SOHO the maximum and minimum solar wind values were 289-345.

Via NOAA the maximum background x-ray solar flux value was B1.5.

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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