Viewing archive of Wednesday, 25 December 2013

Solar activity report

Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2013 Dec 25 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 359 Issued at 2200Z on 25 Dec 2013

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

Solar activity has been at low levels for the past 24 hours. The largest solar event of the period was a C4 event observed at 25/0639Z from old Region 1928 (S16, L=008). There are currently 5 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be low with a chance for M-class flares on days one, two, and three (26 Dec, 27 Dec, 28 Dec).
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, as measured by the ACE spacecraft, reached a peak speed of 338 km/s at 25/0350Z. Total IMF reached 12 nT at 25/0524Z. The maximum southward component of Bz reached -10 nT at 25/1121Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to active levels on day one (26 Dec), quiet to unsettled levels on day two (27 Dec) and quiet levels on day three (28 Dec).
III. Event Probabilities 26 Dec to 28 Dec
Class M25%25%25%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       25 Dec 123
  Predicted   26 Dec-28 Dec 125/125/125
  90 Day Mean        25 Dec 142

V. Geomagnetic A Indices
  Observed Afr/Ap 24 Dec  002/001
  Estimated     Afr/Ap 25 Dec  009/009
  Predicted    Afr/Ap 26 Dec-28 Dec  009/010-009/008-005/005

VI. Geomagnetic Activity Probabilities 26 Dec to 28 Dec
A. Middle Latitudes
Active25%20%10%
Minor storm10%05%01%
Major-severe storm01%01%01%
B. High Latitudes
Active15%15%15%
Minor storm25%25%15%
Major-severe storm35%25%10%

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, Yellowknife, NT

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
Nuuk
Juneau, AK

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

Winnipeg, MB

S1 - Minor solar radiation storm

Minor impacts on HF radio through polar regions

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