Viewing archive of Tuesday, 26 June 2001

Solar activity report

Report of Solar-Geophysical Activity 2001 Jun 26 2200 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 177 Issued at 2200Z on 26 Jun 2001

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

Solar activity was low. The largest event was a long-duration, optically uncorrelated C7 x-ray flare. This flare most likely originated from behind the southeast limb and was probably associated with a large CME observed in the SOHO/LASCO instrument. The remainder of the period was typified by small C-class subflares and a general decay of the observable sunspot regions. No new regions were numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be predominantly low.
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
The geomagnetic field was quiet with unsettled and active periods observed at higher latitudes. The greater that 2 MeV electron flux reached high levels.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to range from quiet to active over the next three days. A high speed stream from a recurrent coronal hole should reach the Earth late on the first day of the period and continue over days two and three. The greater than 2 MeV electron flux is expected to remain at high levels, at least through the first day of the period.
III. Event Probabilities 27 Jun to 29 Jun
Class M30%30%40%
Class X01%01%05%
IV. Penticton 10.7 cm Flux
  Observed       26 Jun 168
  Predicted   27 Jun-29 Jun  160/160/155
  90 Day Mean        26 Jun 171
V. Geomagnetic A Indices
  Observed Afr/Ap 25 Jun  007/008
  Estimated     Afr/Ap 26 Jun  008/011
  Predicted    Afr/Ap 27 Jun-29 Jun  010/015-015/020-015/020
VI. Geomagnetic Activity Probabilities 27 Jun to 29 Jun
A. Middle Latitudes
Minor storm05%10%10%
Major-severe storm01%01%01%
B. High Latitudes
Minor storm10%15%15%
Major-severe storm01%01%01%

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