Viewing archive of Thursday, 15 June 2023

Solar activity report

Report of Solar-Geophysical Activity 2023 Jun 15 2200 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 166 Issued at 2200Z on 15 Jun 2023

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. The largest solar event of the period was a C9 event observed at 15/1255Z from Region 3336 (S21E54). There are currently 8 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 to minor storm levels for the past 24 hours. Solar wind speed reached a peak of 506 km/s at 14/2214Z. Total IMF reached 19 nT at 15/2046Z. The maximum southward component of Bz reached -11 nT at 15/1634Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 150 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to minor storm levels on day one (16 Jun) and quiet to unsettled levels on days two and three (17 Jun, 18 Jun).
III. Event Probabilities 16 Jun to 18 Jun
Class M20%20%20%
Class X05%05%05%
IV. Penticton 10.7 cm Flux
  Observed       15 Jun 153
  Predicted   16 Jun-18 Jun 155/160/160
  90 Day Mean        15 Jun 153

V. Geomagnetic A Indices
  Observed Afr/Ap 14 Jun  005/004
  Estimated     Afr/Ap 15 Jun  015/022
  Predicted    Afr/Ap 16 Jun-18 Jun  017/018-010/012-008/008

VI. Geomagnetic Activity Probabilities 16 Jun to 18 Jun
A. Middle Latitudes
Minor storm15%10%05%
Major-severe storm01%01%01%
B. High Latitudes
Minor storm20%20%15%
Major-severe storm20%25%15%

All times in UTC

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