Viewing archive of Wednesday, 28 August 2013
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 2013 Aug 27 2300 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 239 Issued at 2200Z on 28 Aug 2013IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 5 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
with a chance for a C-class flares on days one, two, and three (28 Aug,
29 Aug, 30 Aug).
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
The geomagnetic
field has been at quiet to minor storm levels for the past 24 hours.
Solar wind speed, as measured by the ACE spacecraft, reached a peak
speed of 440 km/s at 27/2045Z. Total IMF reached 14 nT at 27/1744Z. The
maximum southward component of Bz reached -13 nT at 27/1810Z. Electrons
greater than 2 MeV at geosynchronous orbit reached a peak level of 1407
pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one, two, and three (28 Aug,
29 Aug, 30 Aug).
III. Event Probabilities 28 Aug to 30 Aug
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 27 Aug 110 Predicted 28 Aug-30 Aug 105/100/100 90 Day Mean 27 Aug 114
V. Geomagnetic A Indices
Observed Afr/Ap 26 Aug 004/005 Estimated Afr/Ap 27 Aug 004/005 Predicted Afr/Ap 28 Aug-30 Aug 007/008-007/008-009/012
VI. Geomagnetic Activity Probabilities 28 Aug to 30 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 20% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 25% | 30% |
| Major-severe storm | 20% | 20% | 30% |
All times in UTC
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