Viewing archive of Wednesday, 18 July 2007

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 2007 Jul 18 2203 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 199 Issued at 2200Z on 18 Jul 2007

IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z

Solar activity was very low. No significant activity has been observed during the past 24 hours.
IB. Solar Activity Forecast
Solar activity is expected to be very low.
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
The geomagnetic field was quiet. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels again today.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet to unsettled with a chance for active periods on 19 July as a recurrent coronal hole moves into a geoeffective position. Expect unsettled to active conditions with possible isolated periods of minor storming on 20 - 21 July due to the ensuing coronal hole high speed stream.
III. Event Probabilities 19 Jul to 21 Jul
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFGreen
IV. Penticton 10.7 cm Flux
  Observed       18 Jul 070
  Predicted   19 Jul-21 Jul  070/070/070
  90 Day Mean        18 Jul 075
V. Geomagnetic A Indices
  Observed Afr/Ap 17 Jul  002/005
  Estimated     Afr/Ap 18 Jul  002/005
  Predicted    Afr/Ap 19 Jul-21 Jul  008/010-012/015-008/015
VI. Geomagnetic Activity Probabilities 19 Jul to 21 Jul
A. Middle Latitudes
Active15%20%15%
Minor storm05%10%05%
Major-severe storm01%05%01%
B. High Latitudes
Active20%25%25%
Minor storm10%15%15%
Major-severe storm05%05%05%

All times in UTC

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