:Product: 0615RSGA.txt
:Issued: 2026 Jun 15 2200 UTC
# Prepared jointly by the U.S. Dept. of Commerce, NOAA,
# Space Weather Prediction Center and the U.S. Air Force.
#
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 166 Issued at 2200Z on 15 Jun 2026

IA.  Analysis of Solar Active Regions and Activity from 14/2100Z to
15/2100Z: Solar activity has been at low levels for the past 24 hours.
There are currently 5 numbered sunspot regions on the disk.
IB.  Solar Activity Forecast: Solar activity is expected to be low with
a slight chance for an M-class flare on days one, two, and three (16
Jun, 17 Jun, 18 Jun).

IIA.  Geophysical Activity Summary 14/2100Z to 15/2100Z: The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 490 km/s at 14/2215Z. Total IMF reached 5 nT at
15/2003Z. The maximum southward component of Bz reached -4 nT at
14/2311Z.  Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 1488 pfu.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet to active levels on days one and two (16 Jun, 17 Jun) and
quiet to unsettled levels on day three (18 Jun).

III.  Event probabilities 16 Jun-18 Jun
Class M    20/20/20
Class X    01/01/01
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           15 Jun 117
Predicted   16 Jun-18 Jun 118/118/115
90 Day Mean        15 Jun 126

V.  Geomagnetic A Indices
Observed Afr/Ap 14 Jun   NA/006
Estimated Afr/Ap 15 Jun  005/005
Predicted Afr/Ap 16 Jun-18 Jun  010/012-010/012-008/010

VI.  Geomagnetic Activity Probabilities 16 Jun-18 Jun
A.  Middle Latitudes
Active                30/30/20
Minor Storm           15/15/05
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/15
Minor Storm           25/25/25
Major-severe storm    40/40/30