Viewing archive of Wednesday, 25 January 2023

Solar activity report

Report of Solar-Geophysical Activity 2023 Jan 25 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 25 Issued at 2200Z on 25 Jan 2023

IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z

Solar activity has been at moderate levels for the past 24 hours. The largest solar event of the period was a M4 event observed at 25/1011Z from Region 3190 (S14W89). There are currently 8 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with a chance for M-class flares and a slight chance for an X-class flare on days one and two (26 Jan, 27 Jan) and expected to be low with a chance for M-class flares on day three (28 Jan).
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 559 km/s at 24/2133Z. Total IMF reached 9 nT at 25/1756Z. The maximum southward component of Bz reached -7 nT at 25/1310Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 389 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels on days one, two, and three (26 Jan, 27 Jan, 28 Jan).
III. Event Probabilities 26 Jan to 28 Jan
Class M35%35%25%
Class X10%10%05%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       25 Jan 172
  Predicted   26 Jan-28 Jan 170/165/160
  90 Day Mean        25 Jan 151

V. Geomagnetic A Indices
  Observed Afr/Ap 24 Jan  003/003
  Estimated     Afr/Ap 25 Jan  007/010
  Predicted    Afr/Ap 26 Jan-28 Jan  010/010-008/008-008/008

VI. Geomagnetic Activity Probabilities 26 Jan to 28 Jan
A. Middle Latitudes
Active30%15%10%
Minor storm10%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active15%20%15%
Minor storm30%25%20%
Major-severe storm30%20%15%

All times in UTC

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