Viewing archive of Thursday, 14 December 2023

Solar activity report

Report of Solar-Geophysical Activity 2023 Dec 14 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 348 Issued at 2200Z on 14 Dec 2023

IA. Analysis of Solar Active Regions and Activity from 13-2100Z to 14-2100Z

Solar activity has been at high levels for the past 24 hours. The largest solar event of the period was a X2 event observed at 14/1702Z from Region 3514 (N05W50). There are currently 8 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate with a chance for X-class flares on days one and two (15 Dec, 16 Dec) and expected to be low with a chance for M-class flares and a slight chance for an X-class flare on day three (17 Dec).
IIA. Geophysical Activity Summary 13-2100Z to 14-2100Z
The geomagnetic field has been at quiet to active levels for the past 24 hours. Solar wind speed reached a peak of 415 km/s at 14/0027Z. Total IMF reached 14 nT at 14/0117Z. The maximum southward component of Bz reached -13 nT at 14/0058Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 122 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to minor storm levels on days one and two (15 Dec, 16 Dec) and quiet to unsettled levels on day three (17 Dec). Protons have a chance of crossing threshold on days one and two (15 Dec, 16 Dec) and have a slight chance of crossing threshold on day three (17 Dec).
III. Event Probabilities 15 Dec to 17 Dec
Class M55%55%40%
Class X25%25%15%
Proton35%35%10%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       14 Dec 155
  Predicted   15 Dec-17 Dec 145/140/140
  90 Day Mean        14 Dec 149

V. Geomagnetic A Indices
  Observed Afr/Ap 13 Dec  007/008
  Estimated     Afr/Ap 14 Dec  015/017
  Predicted    Afr/Ap 15 Dec-17 Dec  013/020-019/022-011/012

VI. Geomagnetic Activity Probabilities 15 Dec to 17 Dec
A. Middle Latitudes
Active40%40%25%
Minor storm15%20%05%
Major-severe storm01%01%01%
B. High Latitudes
Active15%15%15%
Minor storm20%20%20%
Major-severe storm35%30%20%

All times in UTC

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

Gillam, MB, Whitehorse, YT, Yellowknife, NT
Fairbanks, AK

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

Edmonton, AB, Iqaluit, NU, Saskatoon, SK
Anchorage, AK, Juneau, AK

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

Calgary, AB
The direction of the interplanetary magnetic field is slightly South (-6.24nT).

S1 - Minor solar radiation storm

Minor impacts on HF radio through polar regions

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