Report of Solar Geophysical Activity


Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 327 Issued at 2200Z on 23 Nov 2015

IA.  Analysis of Solar Active Regions and Activity from 22/2100Z to
23/2100Z: Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C8 event observed at
23/0228Z from Region 2454 (N14W67). 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 and two (24 Nov, 25 Nov) and
expected to be low with a slight chance for an M-class flare on day
three (26 Nov).

IIA.  Geophysical Activity Summary 22/2100Z to 23/2100Z: The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed,
as measured by the ACE spacecraft, reached a peak speed of 359 km/s at
23/0329Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 181 pfu.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet levels on day one (24 Nov) and quiet to active levels on
days two and three (25 Nov, 26 Nov).

III.  Event probabilities 24 Nov-26 Nov
Class M    30/30/20
Class X    05/05/01
Proton     05/05/05
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           23 Nov 120
Predicted   24 Nov-26 Nov 120/115/110
90 Day Mean        23 Nov 105

V.  Geomagnetic A Indices
Observed Afr/Ap 22 Nov  003/002
Estimated Afr/Ap 23 Nov  003/005
Predicted Afr/Ap 24 Nov-26 Nov  005/005-012/015-008/010

VI.  Geomagnetic Activity Probabilities 24 Nov-26 Nov
A.  Middle Latitudes
Active                10/30/25
Minor Storm           05/10/05
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/15
Minor Storm           15/30/30
Major-severe storm    15/40/30
For current space weather conditions please refer to: