Viewing archive of Saturday, 22 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 22 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 234 Issued at 2200Z on 22 Aug 2015IA. Analysis of Solar Active Regions and Activity from 21-2100Z to 22-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M2 event observed at
22/1323Z from Region 2403 (S14E09). 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
(23 Aug, 24 Aug, 25 Aug).
IIA. Geophysical Activity Summary 21-2100Z to 22-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
499 km/s at 21/2207Z. Total IMF reached 10 nT at 22/1130Z. The maximum
southward component of Bz reached -5 nT at 22/1217Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 6539 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to minor storm levels on days one and two (23 Aug, 24
Aug) and quiet to active levels on day three (25 Aug). Protons greater
than 10 Mev have a slight chance of crossing threshold on day three (25
Aug).
III. Event Probabilities 23 Aug to 25 Aug
| Class M | 55% | 55% | 55% |
| Class X | 10% | 10% | 10% |
| Proton | 01% | 05% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 22 Aug 117 Predicted 23 Aug-25 Aug 120/120/120 90 Day Mean 22 Aug 111
V. Geomagnetic A Indices
Observed Afr/Ap 21 Aug 006/005 Estimated Afr/Ap 22 Aug 009/010 Predicted Afr/Ap 23 Aug-25 Aug 021/028-020/028-014/020
VI. Geomagnetic Activity Probabilities 23 Aug to 25 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 45% | 45% | 35% |
| Minor storm | 25% | 25% | 15% |
| Major-severe storm | 05% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 10% |
| Minor storm | 25% | 20% | 25% |
| Major-severe storm | 70% | 70% | 50% |
All times in UTC
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