Viewing archive of Friday, 25 February 2005

Solar activity report

Report of Solar-Geophysical Activity 2005 Feb 25 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 056 Issued at 2200Z on 25 Feb 2005

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

Solar activity was very low.
IB. Solar Activity Forecast
Solar activity is expected to be very low.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic field was quiet to active. Active periods due to the effects of a geoeffective high speed stream. Solar wind speed at ACE has increased from approximately 450 km/s to 550 km/s.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet to active on 26 February. On 27 and 28 February, expect unsettled to active conditions with isolated minor storm periods possible.
III. Event Probabilities 26 Feb to 28 Feb
Class M 01%01%01%
Class X 01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       25 Feb 078
  Predicted    26 Feb-28 Feb  080/080/080
  90 Day Mean        25 Feb 099
V. Geomagnetic A Indices
  Observed Afr/Ap 24 Feb  004/005
  Estimated     Afr/Ap 25 Feb  008/010
  Predicted     Afr/Ap 26 Feb-28 Feb  010/015-012/020-012/020
VI. Geomagnetic Activity Probabilities 26 Feb to 28 Feb
A. Middle Latitudes
Active25%25%25%
Minor storm 10%15%15%
Major-severe storm 01%05%05%
B. High Latitudes
Active30%30%30%
Minor storm 15%20%20%
Major-severe storm 05%15%15%

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