Viewing archive of Saturday, 2 September 2017
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 2017 Sep 02 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 245 Issued at 2200Z on 02 Sep 2017IA. Analysis of Solar Active Regions and Activity from 01-2100Z to 02-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C7 event observed at
02/1541Z from Region 2672 (N08W98). There are currently 4 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a slight chance for an M-class flare on days one, two, and three (03
Sep, 04 Sep, 05 Sep).
IIA. Geophysical Activity Summary 01-2100Z to 02-2100Z
The geomagnetic
field has been at quiet to minor storm levels for the past 24 hours.
Solar wind speed reached a peak of 721 km/s at 02/0239Z. Total IMF
reached 9 nT at 01/2335Z. The maximum southward component of Bz reached
-7 nT at 02/0326Z. Electrons greater than 2 MeV at geosynchronous orbit
reached a peak level of 7573 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (03 Sep) and quiet to
unsettled levels on days two and three (04 Sep, 05 Sep).
III. Event Probabilities 03 Sep to 05 Sep
| Class M | 15% | 15% | 15% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 02 Sep 100 Predicted 03 Sep-05 Sep 101/101/098 90 Day Mean 02 Sep 077
V. Geomagnetic A Indices
Observed Afr/Ap 01 Sep 017/017 Estimated Afr/Ap 02 Sep 020/028 Predicted Afr/Ap 03 Sep-05 Sep 013/015-007/010-007/008
VI. Geomagnetic Activity Probabilities 03 Sep to 05 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 20% | 15% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 25% | 20% |
| Major-severe storm | 20% | 25% | 20% |
All times in UTC
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