[W4HM Spaceweather] W4HM Discussion Of Daily Solar Space And Geomagnetic Weather
Thomas F Giella W4HM
w4hm at tampabay.rr.com
Wed Mar 13 10:47:52 EDT 2013
W4HM DISCUSSION OF DAILY SOLAR SPACE AND GEOMAGNETIC WEATHER-
For Tuesday March 12, 2013
Solar activity was low as far as the emergence of the number of new sunspot
groups. There were 4 new un-numbered sunspot groups and 8 existing numbered
Solar activity was moderate as far as the number of solar flares, 6 occurred
of which 5 were in the C class magnitude. The largest solar flare in
magnitude was a small in size C3.6, which occurred at approximately N11E43
and associated with sunspot group #11692.
Via NOAA SWPC the daily solar flux index (SFI) had been at or above 100 for
14 consecutive days, currently at 126.4.
Via NOAA SWPC the daily sunspot number (SSN) had been below 100 for 1 day,
currently at 95.
The geomagnetic field had been quiet for 1 day with the Kp (planetary) index
reaching a 2, which was quiet geomagnetic conditions. As collected by GFZ
Helmholtz Potsdam, Germany the 3 hour Kp (planetary) intervals were
11112121. As collected by NOAA SWPC Boulder, CO, USA the 3 hour Kp
(planetary) intervals were 11212121.
Via Kyoto U. the Dst ranged between +17 and -2.
Via SOHO and www.sollen.info the solar wind values ranged between 290-328.
Via NOAA/SWPC the maximum southward movement of the vertical component (Bz)
of Earth's magnetic field was -4 nT.
Via NOAA SWPC the maximum background x-ray solar flux value was B3.3.
Via NOAA SWPC the energetic proton flux was < 10 MeV (10+0).
Via NOAA SWPC the energetic electron flux was < 2 MeV (2+0), 113 pfu.
For the latest solar space & geomagnetic weather data go to the W4HM Solar
Space & Geomagnetic Weather Data Dashboard at
For an explanation of how the above indices impact MF and HF radio wave
propagation go to the W4HM 160 Meter (Medium Frequency) Radio Wave
Propagation Theory Notes at http://www.wcflunatall.com/nz4o5.htm .
If you would like to subscribe to the W4HM Daily MF/HF/6M Radio Wave
Propagation Forecast for only $20.00 per year, go to
http://www.solarcycle24.org or http://www.wcflunatall.com/propagation.htm .
73 & GUD DX,
Thomas F. Giella, W4HM
Lakeland, FL, USA
w4hm at tampabay.rr.com
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