Viewing archive of Sunday, 23 August 2015
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 2015 Aug 23 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 235 Issued at 2200Z on 23 Aug 2015IA. Analysis of Solar Active Regions and Activity from 22-2100Z to 23-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M3 event observed at
22/2124Z from Region 2403 (S15W04). There are currently 2 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a slight chance for an X-class flare on days one, two, and three
(24 Aug, 25 Aug, 26 Aug).
IIA. Geophysical Activity Summary 22-2100Z to 23-2100Z
The geomagnetic
field has been at quiet to major storm levels for the past 24 hours.
Solar wind speed, as measured by the ACE spacecraft, reached a peak
speed of 611 km/s at 23/1403Z. Total IMF reached 15 nT at 23/0740Z. The
maximum southward component of Bz reached -12 nT at 23/0731Z. Electrons
greater than 2 MeV at geosynchronous orbit reached a peak level of 207
pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (24 Aug) and quiet
to active levels on days two and three (25 Aug, 26 Aug). Protons greater
than 10 Mev have a slight chance of crossing threshold on days two and
three (25 Aug, 26 Aug).
III. Event Probabilities 24 Aug to 26 Aug
| Class M | 55% | 55% | 55% |
| Class X | 10% | 10% | 10% |
| Proton | 05% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 23 Aug 133 Predicted 24 Aug-26 Aug 120/120/125 90 Day Mean 23 Aug 111
V. Geomagnetic A Indices
Observed Afr/Ap 22 Aug 008/008 Estimated Afr/Ap 23 Aug 025/032 Predicted Afr/Ap 24 Aug-26 Aug 020/028-014/020-010/012
VI. Geomagnetic Activity Probabilities 24 Aug to 26 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 45% | 35% | 30% |
| Minor storm | 25% | 15% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 10% | 15% |
| Minor storm | 20% | 25% | 30% |
| Major-severe storm | 70% | 50% | 40% |
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