Viewing archive of Sunday, 9 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 09 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 221 Issued at 2200Z on 09 Aug 2015IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C4 event observed at
09/0752Z from Region 2396 (S17W24). There are currently 4 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, two, and three (10 Aug, 11 Aug,
12 Aug).
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
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
595 km/s at 09/0912Z. Total IMF reached 8 nT at 09/0441Z. The maximum
southward component of Bz reached -6 nT at 09/0320Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 2253 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on day one (10 Aug), quiet to
active levels on day two (11 Aug) and quiet to unsettled levels on day
three (12 Aug).
III. Event Probabilities 10 Aug to 12 Aug
| Class M | 35% | 35% | 35% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 09 Aug 115 Predicted 10 Aug-12 Aug 115/115/110 90 Day Mean 09 Aug 114
V. Geomagnetic A Indices
Observed Afr/Ap 08 Aug 015/014 Estimated Afr/Ap 09 Aug 012/014 Predicted Afr/Ap 10 Aug-12 Aug 018/022-010/012-007/008
VI. Geomagnetic Activity Probabilities 10 Aug to 12 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 30% | 10% |
| Minor storm | 20% | 05% | 01% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 15% |
| Minor storm | 30% | 35% | 20% |
| Major-severe storm | 50% | 30% | 15% |
All times in UTC
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