Viewing archive of Wednesday, 27 August 2014
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 2014 Aug 27 2200 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 27 Aug 2014IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C5 event observed at
26/2325Z from Region 2146 (N07W58). There are currently 5 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares on days one and two (28 Aug, 29 Aug) and
expected to be low with a slight chance for an M-class flare on day
three (30 Aug).
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
368 km/s at 27/2051Z. Total IMF reached 14 nT at 27/0848Z. The maximum
southward component of Bz reached -14 nT at 27/0819Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to major storm levels on day one (28 Aug), quiet to
active levels on day two (29 Aug) and quiet to unsettled levels on day
three (30 Aug). Protons greater than 10 Mev have a slight chance of
crossing threshold on day one (28 Aug).
III. Event Probabilities 28 Aug to 30 Aug
| Class M | 40% | 30% | 20% |
| Class X | 05% | 05% | 01% |
| Proton | 10% | 05% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 27 Aug 123 Predicted 28 Aug-30 Aug 125/125/120 90 Day Mean 27 Aug 128
V. Geomagnetic A Indices
Observed Afr/Ap 26 Aug 005/004 Estimated Afr/Ap 27 Aug 016/021 Predicted Afr/Ap 28 Aug-30 Aug 018/025-010/010-008/008
VI. Geomagnetic Activity Probabilities 28 Aug to 30 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 35% | 15% |
| Minor storm | 30% | 10% | 01% |
| Major-severe storm | 10% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 15% |
| Major-severe storm | 30% | 20% | 10% |
All times in UTC
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