Viewing archive of Monday, 30 July 2001

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 2001 Jul 30 2200 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 211 Issued at 2200Z on 30 Jul 2001

IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z

Solar activity was at low levels due to two C-class events during the period. A C4 x-ray flare occurred at 30/0834 UTC. Although optically uncorrelated, EIT imagery shows that the probable flare location was newly numbered Region 9562 (N05E70). Region 9561 (S13E63) was also numbered today. An optically uncorrelated C6 flare occurred at the end of the period, at 30/2043 UTC. A Type II radio sweep (with a velocity of 700 km/s) was associated with this flare. Overall, the disk and limbs were mostly quiet and stable.
IB. Solar Activity Forecast
Solar activity is expected to remain at very low to low levels.
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
The geomagnetic field was at quiet to unsettled conditions.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled conditions.
III. Event Probabilities 31 Jul to 02 Aug
Class M15%15%15%
Class X01%01%01%
IV. Penticton 10.7 cm Flux
  Observed       30 Jul 115
  Predicted   31 Jul-02 Aug  120/120/120
  90 Day Mean        30 Jul 151
V. Geomagnetic A Indices
  Observed Afr/Ap 29 Jul  005/008
  Estimated     Afr/Ap 30 Jul  006/007
  Predicted    Afr/Ap 31 Jul-02 Aug  008/008-008/008-010/010
VI. Geomagnetic Activity Probabilities 31 Jul to 02 Aug
A. Middle Latitudes
Minor storm10%10%10%
Major-severe storm01%01%01%
B. High Latitudes
Minor storm15%15%15%
Major-severe storm01%01%01%

All times in UTC

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