Report of Solar Geophysical Activity

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 26 Issued at 2200Z on 26 Jan 2017

IA.  Analysis of Solar Active Regions and Activity from 25/2100Z to
26/2100Z: Solar activity has been at very low levels for the past 24
hours. There are currently 2 numbered sunspot regions on the disk.
IB.  Solar Activity Forecast: Solar activity is expected to be very low
with a chance for a C-class flares on days one, two, and three (27 Jan,
28 Jan, 29 Jan).

IIA.  Geophysical Activity Summary 25/2100Z to 26/2100Z: The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 578 km/s at 26/2032Z. Total IMF reached 16
nT at 26/2039Z. The maximum southward component of Bz reached -9 nT at
26/1527Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 1282 pfu.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet to active levels on days one and two (27 Jan, 28 Jan) and
quiet to unsettled levels on day three (29 Jan).

III.  Event probabilities 27 Jan-29 Jan
Class M    05/05/05
Class X    01/01/01
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           26 Jan 083
Predicted   27 Jan-29 Jan 082/082/082
90 Day Mean        26 Jan 077

V.  Geomagnetic A Indices
Observed Afr/Ap 25 Jan  004/004
Estimated Afr/Ap 26 Jan  008/012
Predicted Afr/Ap 27 Jan-29 Jan  011/015-011/015-008/008

VI.  Geomagnetic Activity Probabilities 27 Jan-29 Jan
A.  Middle Latitudes
Active                30/30/10
Minor Storm           10/10/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/20
Minor Storm           30/30/20
Major-severe storm    40/40/10