Viewing archive of Sunday, 1 September 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 Sep 01 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 244 Issued at 2200Z on 01 Sep 2013IA. Analysis of Solar Active Regions and Activity from 31-2100Z to 01-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C1 event observed at
01/1420Z from Region 1834 (N12W34). There are currently 3 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be low on days
one, two, and three (02 Sep, 03 Sep, 04 Sep).
IIA. Geophysical Activity Summary 31-2100Z to 01-2100Z
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
599 km/s at 01/1215Z. Total IMF reached 6 nT at 01/0607Z. The maximum
southward component of Bz reached -4 nT at 01/1204Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 446 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (02 Sep), quiet levels on day
two (03 Sep) and quiet to unsettled levels on day three (04 Sep).
III. Event Probabilities 02 Sep to 04 Sep
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 01 Sep 104 Predicted 02 Sep-04 Sep 105/108/110 90 Day Mean 01 Sep 114
V. Geomagnetic A Indices
Observed Afr/Ap 31 Aug 011/013 Estimated Afr/Ap 01 Sep 012/013 Predicted Afr/Ap 02 Sep-04 Sep 013/015-006/005-007/008
VI. Geomagnetic Activity Probabilities 02 Sep to 04 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 10% | 15% |
| Minor storm | 15% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 15% | 25% |
| Major-severe storm | 45% | 10% | 20% |
All times in UTC
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