Viewing archive of Friday, 11 August 2017

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 2017 Aug 11 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 223 Issued at 2200Z on 11 Aug 2017

IA. Analysis of Solar Active Regions and Activity from 10-2100Z to 11-2100Z

Solar activity has been at very low levels for the past 24 hours. There are currently 1 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low on days one, two, and three (12 Aug, 13 Aug, 14 Aug).
IIA. Geophysical Activity Summary 10-2100Z to 11-2100Z
The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 486 km/s at 11/2042Z. Total IMF reached 10 nT at 11/1816Z. The maximum southward component of Bz reached -7 nT at 11/1421Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 4352 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to active levels on days one and two (12 Aug, 13 Aug) and quiet to unsettled levels on day three (14 Aug).
III. Event Probabilities 12 Aug to 14 Aug
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       11 Aug 070
  Predicted   12 Aug-14 Aug 070/068/068
  90 Day Mean        11 Aug 076

V. Geomagnetic A Indices
  Observed Afr/Ap 10 Aug  007/004
  Estimated     Afr/Ap 11 Aug  006/006
  Predicted    Afr/Ap 12 Aug-14 Aug  012/015-010/012-009/008

VI. Geomagnetic Activity Probabilities 12 Aug to 14 Aug
A. Middle Latitudes
Active30%25%15%
Minor storm10%10%05%
Major-severe storm01%01%01%
B. High Latitudes
Active15%15%15%
Minor storm25%30%25%
Major-severe storm40%40%25%

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, Whitehorse, YT
Juneau, AK
A southern hemisphere coronal hole was detected in an earth-facing position on Tuesday, 8 April 2025

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