Viewing archive of Friday, 4 December 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 Dec 04 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 338 Issued at 2200Z on 04 Dec 2015IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z 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
04/1710Z from Region 2462 (N09E57). There are currently 2 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
with a chance for a C-class flares on days one, two, and three (05 Dec,
06 Dec, 07 Dec).
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
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
411 km/s at 03/2340Z. Total IMF reached 8 nT at 04/1950Z. The maximum
southward component of Bz reached -6 nT at 04/1924Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 1474 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (05 Dec), quiet to minor
storm levels on day two (06 Dec) and unsettled to minor storm levels on
day three (07 Dec).
III. Event Probabilities 05 Dec to 07 Dec
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 04 Dec 098 Predicted 05 Dec-07 Dec 100/100/105 90 Day Mean 04 Dec 106
V. Geomagnetic A Indices
Observed Afr/Ap 03 Dec 003/004 Estimated Afr/Ap 04 Dec 006/006 Predicted Afr/Ap 05 Dec-07 Dec 007/008-014/018-020/025
VI. Geomagnetic Activity Probabilities 05 Dec to 07 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 35% | 35% |
| Minor storm | 05% | 20% | 20% |
| Major-severe storm | 01% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 10% | 10% |
| Minor storm | 25% | 30% | 30% |
| Major-severe storm | 20% | 55% | 55% |
All times in UTC
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