Report of Solar Geophysical Activity

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 293 Issued at 2200Z on 20 Oct 2014

IA.  Analysis of Solar Active Regions and Activity from 19/2100Z to
20/2100Z: Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M4 event observed at
20/1637Z from Region 2192 (S13E30). There are currently 4 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
(21 Oct, 22 Oct, 23 Oct).

IIA.  Geophysical Activity Summary 19/2100Z to 20/2100Z: The geomagnetic
field has been at quiet to minor storm levels for the past 24 hours.
Solar wind speed, as measured by the ACE spacecraft, reached a peak
speed of 606 km/s at 20/1945Z. Total IMF reached 10 nT at 20/1616Z. The
maximum southward component of Bz reached -8 nT at 20/1641Z. Electrons
greater than 2 MeV at geosynchronous orbit reached a peak level of 296
pfu.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (21 Oct), quiet to
active levels on day two (22 Oct) and quiet to unsettled levels on day
three (23 Oct). Protons have a slight chance of crossing threshold on
days one, two, and three (21 Oct, 22 Oct, 23 Oct).

III.  Event probabilities 21 Oct-23 Oct
Class M    60/60/60
Class X    20/20/20
Proton     10/10/10
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           20 Oct 185
Predicted   21 Oct-23 Oct 195/200/205
90 Day Mean        20 Oct 134

V.  Geomagnetic A Indices
Observed Afr/Ap 19 Oct  009/009
Estimated Afr/Ap 20 Oct  010/012
Predicted Afr/Ap 21 Oct-23 Oct  015/018-013/015-013/015

VI.  Geomagnetic Activity Probabilities 21 Oct-23 Oct
A.  Middle Latitudes
Active                30/25/25
Minor Storm           15/10/10
Major-severe storm    01/01/01
B.  High Latitudes
Active                10/15/15
Minor Storm           25/30/30
Major-severe storm    45/40/40

Radio Events Observed 20 Oct 2014
A.  245 MHz Bursts
Start  End   Peak Flux  Time of Peak  Duration
0004   0004    140          0004        0000  
0121   0121    260          0121        0000  
0200   0200    100          0200        0000  
1046   1046    140          1046        0000  
1834   1836    1400         1834        0002  
1856   1901    14000        1857        0005  
1920   1920    100          1920        0000  
B.  245 MHz Noise Storms
No 245 MHz Noise Storms Observed.