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Solar activity report

Report of Solar-Geophysical Activity 2021 Jun 04 2200 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 155 Issued at 2200Z on 04 Jun 2021

IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z

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 (05 Jun, 06 Jun, 07 Jun).
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 439 km/s at 04/2039Z. Total IMF reached 8 nT at 03/2327Z. The maximum southward component of Bz reached -5 nT at 04/0153Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 143 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet levels on days one, two, and three (05 Jun, 06 Jun, 07 Jun).
III. Event Probabilities 05 Jun to 07 Jun
Class M01%01%01%
Class X01%01%01%
IV. Penticton 10.7 cm Flux
  Observed       04 Jun 077
  Predicted   05 Jun-07 Jun 077/077/077
  90 Day Mean        04 Jun 077

V. Geomagnetic A Indices
  Observed Afr/Ap 03 Jun  008/008
  Estimated     Afr/Ap 04 Jun  007/007
  Predicted    Afr/Ap 05 Jun-07 Jun  005/005-006/005-006/005

VI. Geomagnetic Activity Probabilities 05 Jun to 07 Jun
A. Middle Latitudes
Minor storm01%01%01%
Major-severe storm01%01%01%
B. High Latitudes
Minor storm20%20%20%
Major-severe storm20%10%10%

All times in UTC

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