[NZ4O Spaceweather] Discussion Of Daily Solar Space And Geomagnetic Weather

Thomas F Giella NZ4O nz4o at tampabay.rr.com
Thu Feb 14 09:48:03 EST 2013


For Wednesday February 13, 2013

Solar activity is high as far as the emergence of the number of new sunspot 
groups. Currently there are 6 new un-numbered sunspot groups and 3 existing 
numbered sunspot groups.

Solar activity is moderate as far as the number of new solar flares, 5 
occurred. The largest solar flare in magnitude was a very small in size 
B8.0, associated with sunspot group #11670, at that time located at 
approximately N17W41.

The daily solar flux index (SFI) has been above 100 for 14 consecutive days, 
currently at 100.3.

The daily sunspot number (SSN) has languished below 100 for 29 consecutive 
days, currently (NOAA) at 26.

The geomagnetic field has been active for the second day in a row with the 
Kp (planetary) index as high as a 4. As collected by Potsdam Germany WDC the 
3 hour Kp (planetary) intervals were 33111134. As collected by NOAA/SWPC the 
3 hour Kp (planetary) intervals were 22111134.

The Dst ranged between +6 and -9. So far today through 1400 UTC the Dst has 
been as negative as -47.

Via SOHO the maximum and minimum solar wind values were 305-381 km/s.

The maximum background x-ray value was B1.6.

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/kn4lf5.htm .

To subscribe to the NZ4O 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, NZ4O
Lakeland, FL, USA
nz4o at tampabay.rr.com

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