Report of Solar Geophysical Activity

 

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 40 Issued at 2200Z on 09 Feb 2015

IA.  Analysis of Solar Active Regions and Activity from 08/2100Z to
09/2100Z: Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C3 event observed at
09/0607Z. There are currently 4 numbered sunspot regions on the disk.
IB.  Solar Activity Forecast: Solar activity is expected to be low with
a chance for M-class flares on days one, two, and three (10 Feb, 11 Feb,
12 Feb).

IIA.  Geophysical Activity Summary 08/2100Z to 09/2100Z: The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
565 km/s at 08/2321Z. Total IMF reached 7 nT at 08/2101Z. The maximum
southward component of Bz reached -5 nT at 09/1943Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 530 pfu.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet to unsettled levels on days one and two (10 Feb, 11 Feb)
and quiet levels on day three (12 Feb).

III.  Event probabilities 10 Feb-12 Feb
Class M    30/30/30
Class X    05/05/05
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           09 Feb 146
Predicted   10 Feb-12 Feb 150/150/150
90 Day Mean        09 Feb 154

V.  Geomagnetic A Indices
Observed Afr/Ap 08 Feb  007/008
Estimated Afr/Ap 09 Feb  007/007
Predicted Afr/Ap 10 Feb-12 Feb  007/008-007/008-007/008

VI.  Geomagnetic Activity Probabilities 10 Feb-12 Feb
A.  Middle Latitudes
Active                15/15/15
Minor Storm           01/01/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                20/20/20
Minor Storm           25/25/25
Major-severe storm    20/20/20
Radio Events Observed 09 Feb 2015
A.  245 MHz Bursts
Start  End   Peak Flux  Time of Peak  Duration
2317   2332    480          2327        0015  
2337   2337    100          2337        0000  
2334   2334    110          2334        0000  
B.  245 MHz Noise Storms
No 245 MHz Noise Storms Observed.
 

NOAA Space Weather Scale descriptions can be found at

www.sec.noaa.gov/NOAAscales