Viewing archive of Wednesday, 23 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 23 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 357 Issued at 2200Z on 23 Dec 2015IA. Analysis of Solar Active Regions and Activity from 22-2100Z to 23-2100Z
Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M4 event observed at
23/0040Z from Region 2473 (S23E49). 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 and a slight chance for an X-class flare on
days one, two, and three (24 Dec, 25 Dec, 26 Dec).
IIA. Geophysical Activity Summary 22-2100Z to 23-2100Z
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
527 km/s at 23/1343Z. Total IMF reached 10 nT at 23/1304Z. The maximum
southward component of Bz reached -7 nT at 23/1252Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 3889 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and two (24 Dec, 25 Dec) and
quiet to unsettled levels on day three (26 Dec).
III. Event Probabilities 24 Dec to 26 Dec
| Class M | 50% | 50% | 50% |
| Class X | 10% | 10% | 10% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 23 Dec 134 Predicted 24 Dec-26 Dec 135/130/125 90 Day Mean 23 Dec 110
V. Geomagnetic A Indices
Observed Afr/Ap 22 Dec 008/010 Estimated Afr/Ap 23 Dec 007/009 Predicted Afr/Ap 24 Dec-26 Dec 010/012-012/014-010/010
VI. Geomagnetic Activity Probabilities 24 Dec to 26 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 20% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 20% |
| Minor storm | 30% | 30% | 25% |
| Major-severe storm | 30% | 25% | 20% |
All times in UTC
Current data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future
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