Viewing archive of Tuesday, 16 December 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 Dec 16 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 350 Issued at 2200Z on 16 Dec 2014IA. Analysis of Solar Active Regions and Activity from 15-2100Z to 16-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C5 event observed at
16/1140Z from Region 2242 (S19E11). There are currently 9 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a slight chance for an X-class flare on days one, two, and three
(17 Dec, 18 Dec, 19 Dec).
IIA. Geophysical Activity Summary 15-2100Z to 16-2100Z
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
487 km/s at 16/0214Z. Total IMF reached 7 nT at 15/2103Z. The maximum
southward component of Bz reached -6 nT at 16/1235Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 958 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one, two, and three (17 Dec,
18 Dec, 19 Dec). Protons have a slight chance of crossing threshold on
days one, two, and three (17 Dec, 18 Dec, 19 Dec).
III. Event Probabilities 17 Dec to 19 Dec
| Class M | 55% | 55% | 55% |
| Class X | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 16 Dec 185 Predicted 17 Dec-19 Dec 185/185/185 90 Day Mean 16 Dec 153
V. Geomagnetic A Indices
Observed Afr/Ap 15 Dec 011/012 Estimated Afr/Ap 16 Dec 008/008 Predicted Afr/Ap 17 Dec-19 Dec 010/010-007/008-007/008
VI. Geomagnetic Activity Probabilities 17 Dec to 19 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 25% | 25% |
| Major-severe storm | 30% | 20% | 20% |
All times in UTC
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