W7EES  > SWPC     27.02.21 09:30z 48 Lines 1718 Bytes #152 (0) @ WW
BID : 26607_W7EES
Subj: Solar-Geophysical Activity
Sent: 210227/0116Z 26607@W7EES.#NWOR.OR.USA.NOAM BPQ6.0.21

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 57 Issued at 2200Z on 26 Feb 2021

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 1 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 Feb,
28 Feb, 01 Mar).

IIA.  Geophysical Activity Summary 25/2100Z to 26/2100Z: The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 496 km/s at 25/2140Z. Total IMF reached 6
nT at 26/1406Z. The maximum southward component of Bz reached -5 nT at
26/1254Z.  Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 6369 pfu.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet levels on days one and two (27 Feb, 28 Feb) and quiet to
active levels on day three (01 Mar).

III.  Event probabilities 27 Feb-01 Mar
Class M    05/05/05
Class X    01/01/01
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           26 Feb 080
Predicted   27 Feb-01 Mar 080/080/078
90 Day Mean        26 Feb 080

V.  Geomagnetic A Indices
Observed Afr/Ap 25 Feb  013/015
Estimated Afr/Ap 26 Feb  009/008
Predicted Afr/Ap 27 Feb-01 Mar  006/005-006/005-010/012

VI.  Geomagnetic Activity Probabilities 27 Feb-01 Mar
A.  Middle Latitudes
Active                05/05/25
Minor Storm           01/01/10
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/15
Minor Storm           20/20/30
Major-severe storm    10/10/40

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