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Viewing archive of Monday, 4 December 2023

Solar activity report

Report of Solar-Geophysical Activity 2023 Dec 04 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 338 Issued at 2200Z on 04 Dec 2023

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

Solar activity has been at low levels for the past 24 hours. The largest solar event of the period was a C8 event observed at 04/0126Z from Region 3511 (S23E11). 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 on days one, two, and three (05 Dec, 06 Dec, 07 Dec).
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 581 km/s at 04/1127Z. Total IMF reached 13 nT at 04/2053Z. The maximum southward component of Bz reached -8 nT at 04/0700Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 134 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to minor storm levels on day one (05 Dec), quiet to active levels on day two (06 Dec) and quiet levels on day three (07 Dec).
III. Event Probabilities 05 Dec to 07 Dec
Class M30%25%25%
Class X05%05%05%
Proton05%05%05%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       04 Dec 138
  Predicted   05 Dec-07 Dec 135/130/130
  90 Day Mean        04 Dec 151

V. Geomagnetic A Indices
  Observed Afr/Ap 03 Dec  010/008
  Estimated     Afr/Ap 04 Dec  014/017
  Predicted    Afr/Ap 05 Dec-07 Dec  014/018-011/012-007/008

VI. Geomagnetic Activity Probabilities 05 Dec to 07 Dec
A. Middle Latitudes
Active35%20%15%
Minor storm15%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active15%15%15%
Minor storm20%15%20%
Major-severe storm20%10%10%

All times in UTC

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Active geomagnetic conditions

Observed Kp: 4
Threshold reached: 01:33 UTC

Current data suggests there is a moderate possibility for aurora to appear at the following high latitude regions in the near future

Gillam, MB

Current data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future

Iqaluit, NU
Nuuk
Reykjavik
The strength of the interplanetary magnetic field is moderate (10.83nT), the direction is slightly South (-4.56nT).

S1 - Minor solar radiation storm

Minor impacts on HF radio through polar regions

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