Report of Solar Geophysical Activity (RSGA)

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 55 Issued at 2200Z on 24 Feb 2014

IA.  Analysis of Solar Active Regions and Activity from 23/2100Z to
24/2100Z: Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M1 event observed at
24/1205Z. There are currently 5 numbered sunspot regions on the disk.
IB.  Solar Activity Forecast: Solar activity is likely to be moderate
with a slight chance for an X-class flare on days one, two, and three
(25 Feb, 26 Feb, 27 Feb).

IIA.  Geophysical Activity Summary 23/2100Z to 24/2100Z: The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
589 km/s at 24/0550Z. Total IMF reached 9 nT at 23/2224Z. The maximum
southward component of Bz reached -3 nT at 23/2101Z.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet to unsettled levels on days one and three (25 Feb, 27
Feb) and quiet levels on day two (26 Feb).

III.  Event probabilities 25 Feb-27 Feb
Class M    60/60/60
Class X    10/10/10
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           24 Feb 171
Predicted   25 Feb-27 Feb 175/180/180
90 Day Mean        24 Feb 157

V.  Geomagnetic A Indices
Observed Afr/Ap 23 Feb  012/017
Estimated Afr/Ap 24 Feb  008/007
Predicted Afr/Ap 25 Feb-27 Feb  009/008-006/005-007/007

VI.  Geomagnetic Activity Probabilities 25 Feb-27 Feb
A.  Middle Latitudes
Active                10/05/15
Minor Storm           01/01/05
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/15
Minor Storm           20/15/25
Major-severe storm    20/05/25
Radio Events Observed 24 Feb 2014
A.  245 MHz Bursts
Start  End   Peak Flux  Time of Peak  Duration
0247   0247    140          0247        0000  
1201   1204    930          1203        0003  
1312   1312    100          1312        0000  
1446   1446    950          1446        0000  
1900   1901    330          1900        0001  
B.  245 MHz Noise Storms
No 245 MHz Noise Storms Observed.
 

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www.sec.noaa.gov/NOAAscales