Viewing archive of Thursday, 24 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 24 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 358 Issued at 2200Z on 24 Dec 2015IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M1 event observed at
24/0212Z from Region 2473 (S22E35). There are currently 3 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 and two (25 Dec, 26 Dec) and expected to be low with a chance
for M-class flares on day three (27 Dec).
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
573 km/s at 24/2041Z. Total IMF reached 10 nT at 24/0434Z. The maximum
southward component of Bz reached -7 nT at 24/0418Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 4505 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (25 Dec) and quiet to
unsettled levels on days two and three (26 Dec, 27 Dec).
III. Event Probabilities 25 Dec to 27 Dec
| Class M | 45% | 45% | 40% |
| Class X | 10% | 10% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 24 Dec 133 Predicted 25 Dec-27 Dec 135/130/125 90 Day Mean 24 Dec 110
V. Geomagnetic A Indices
Observed Afr/Ap 23 Dec 007/007 Estimated Afr/Ap 24 Dec 010/013 Predicted Afr/Ap 25 Dec-27 Dec 011/012-010/010-008/008
VI. Geomagnetic Activity Probabilities 25 Dec to 27 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 10% |
| Minor storm | 05% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 15% |
| Minor storm | 25% | 25% | 25% |
| Major-severe storm | 25% | 20% | 20% |
All times in UTC
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