Viewing archive of Wednesday, 16 May 2012

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 2012 May 16 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 137 Issued at 2200Z on 16 May 2012

IA. Analysis of Solar Active Regions and Activity from 15-2100Z to 16-2100Z

Solar activity was low. Region 1476 (N13W73) produced a few C-class flares while continuing to decay. Regions 1482 (N13E10) and 1484 (N09E38) also produced a few low level C-class events. A pair of CMEs associated with apparent filament eruptions were observed in LASCO C2/C3, but neither appear to be earth directed.
IB. Solar Activity Forecast
Solar activity is expected to be very low to low for the next 3 days (17-19 May).
IIA. Geophysical Activity Summary 15-2100Z to 16-2100Z
The geomagnetic field was mostly quiet. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels during the period.
IIB. Geophysical Activity Forecast
With the exception of an isolated unsettled or active period early on day 1 (17 May) from an expected solar sector boundary crossing, geomagnetic field conditions are expected to be mostly quiet throughout the period (17-19 May).
III. Event Probabilities 17 May to 19 May
Class M10%10%10%
Class X01%01%01%
Proton01%01%01%
PCAFGreen
IV. Penticton 10.7 cm Flux
  Observed       16 May 131
  Predicted   17 May-19 May  130/130/130
  90 Day Mean        16 May 115
V. Geomagnetic A Indices
  Observed Afr/Ap 15 May  005/005
  Estimated     Afr/Ap 16 May  007/008
  Predicted    Afr/Ap 17 May-19 May  004/005-004/005-004/005
VI. Geomagnetic Activity Probabilities 17 May to 19 May
A. Middle Latitudes
Active10%10%10%
Minor storm01%01%01%
Major-severe storm01%01%01%
B. High Latitudes
Active15%15%15%
Minor storm01%01%01%
Major-severe storm01%01%01%

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