Viewing archive of Thursday, 26 August 2004

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 2004 Aug 26 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 239 Issued at 2200Z on 26 Aug 2004

IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z

Solar activity remained at low levels today. Region 663 (N10W14) produced the largest flare during the period, a C1 x-ray flare that occurred at 26/0219Z. No significant changes were observed in the two visible spotted Regions 663 and 664 (S11W42) in magnetic complexity or spot area during the period. Spray was observed at N01W90 from 26/0034Z to 26/0103Z and is believed to be from Region 661 (N06, L=348) which rotated off the solar west limb today. No new regions were numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be at very low to low levels today.
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
The geomagnetic field was at quiet to unsettled levels today. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels throughout the period.
III. Event Probabilities 27 Aug to 29 Aug
Class M05%05%05%
Class X01%01%01%
Proton01%01%01%
PCAFGreen
IV. Penticton 10.7 cm Flux
  Observed       26 Aug 098
  Predicted   27 Aug-29 Aug  095/095/090
  90 Day Mean        26 Aug 110
V. Geomagnetic A Indices
  Observed Afr/Ap 25 Aug  003/007
  Estimated     Afr/Ap 26 Aug  004/007
  Predicted    Afr/Ap 27 Aug-29 Aug  006/008-006/008-004/005
VI. Geomagnetic Activity Probabilities 27 Aug to 29 Aug
A. Middle Latitudes
Active15%15%10%
Minor storm01%01%01%
Major-severe storm01%01%01%
B. High Latitudes
Active15%15%15%
Minor storm05%05%01%
Major-severe storm01%01%01%
COMMENTS: The ACE spacecraft orbit will bring ACE to its closest approach with the Sun on August 30, 2004. During that time possible solar radio noise may interfere with spacecraft telemetry resulting in the loss of real time solar wind plasma, magnetic field, and particle data.

All times in UTC

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