Viewing archive of Sunday, 7 September 2014
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 2014 Sep 07 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 250 Issued at 2200Z on 07 Sep 2014IA. Analysis of Solar Active Regions and Activity from 06-2100Z to 07-2100Z 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
07/1943Z from Region 2157 (S14E31). There are currently 9 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a chance for X-class flares on days one, two, and three (08 Sep, 09
Sep, 10 Sep).
IIA. Geophysical Activity Summary 06-2100Z to 07-2100Z
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
432 km/s at 06/2106Z. Total IMF reached 10 nT at 07/0035Z. The maximum
southward component of Bz reached -5 nT at 06/2323Z. Protons greater
than 10 MeV at geosynchronous orbit reached a peak level of 9 pfu at
06/2245Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 105 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and three (08 Sep, 10
Sep) and quiet levels on day two (09 Sep). Protons have a chance of
crossing threshold on days one, two, and three (08 Sep, 09 Sep, 10 Sep).
III. Event Probabilities 08 Sep to 10 Sep
| Class M | 70% | 70% | 70% |
| Class X | 30% | 30% | 30% |
| Proton | 30% | 30% | 30% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 07 Sep 151 Predicted 08 Sep-10 Sep 148/145/150 90 Day Mean 07 Sep 130
V. Geomagnetic A Indices
Observed Afr/Ap 06 Sep 007/009 Estimated Afr/Ap 07 Sep 010/011 Predicted Afr/Ap 08 Sep-10 Sep 008/008-006/005-007/008
VI. Geomagnetic Activity Probabilities 08 Sep to 10 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 15% |
| Minor storm | 01% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 20% | 25% |
| Major-severe storm | 20% | 15% | 20% |
All times in UTC
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