Viewing archive of Tuesday, 22 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 22 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 356 Issued at 2200Z on 22 Dec 2015IA. Analysis of Solar Active Regions and Activity from 21-2100Z to 22-2100Z 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
22/0334Z from Region 2473 (S23E62). 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 (23 Dec, 24 Dec, 25 Dec).
IIA. Geophysical Activity Summary 21-2100Z to 22-2100Z
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
505 km/s at 22/0513Z. Total IMF reached 14 nT at 21/2129Z. The maximum
southward component of Bz reached -10 nT at 22/0908Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 1727 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on day one (23 Dec), quiet to unsettled levels on
day two (24 Dec) and quiet to active levels on day three (25 Dec).
III. Event Probabilities 23 Dec to 25 Dec
| Class M | 45% | 45% | 45% |
| Class X | 10% | 10% | 10% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 22 Dec 130 Predicted 23 Dec-25 Dec 130/130/125 90 Day Mean 22 Dec 109
V. Geomagnetic A Indices
Observed Afr/Ap 21 Dec 022/037 Estimated Afr/Ap 22 Dec 009/009 Predicted Afr/Ap 23 Dec-25 Dec 006/006-008/010-011/012
VI. Geomagnetic Activity Probabilities 23 Dec to 25 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 20% |
| Minor storm | 20% | 30% | 30% |
| Major-severe storm | 20% | 30% | 25% |
All times in UTC
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