Viewing archive of Monday, 19 December 2011
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 2011 Dec 19 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 353 Issued at 2200Z on 19 Dec 2011IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z Solar activity has been at very low levels for the past
24 hours. A total of 9 numbered regions populate the visible disk.
Regions 1376 (N19W31) has been the most active region in the past
few days. The largest flare of the period was a B8 x-ray event at
1413Z from Region 1376. Both Regions 1381 (S18E10) and 1382 (S18E18)
continue to grow and evolve and remain the most magnetically complex
regions on the disk. Regions 1383 (N04E68) was numbered early in the
period.
IB. Solar Activity Forecast
Solar activity is expected to be at
predominantly low levels for the next three days (20 - 22 December).
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
The geomagnetic field has been at quiet levels for the past 24 hours.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be remain at quiet levels for the next three days (20 -
22 December). Even though quiet conditions are expected, a small
coronal hole high speed stream is expected to become geoeffective on
day 1 (20 December).
III. Event Probabilities 20 Dec to 22 Dec
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 19 Dec 128 Predicted 20 Dec-22 Dec 130/130/125 90 Day Mean 19 Dec 145
V. Geomagnetic A Indices
Observed Afr/Ap 18 Dec 003/002 Estimated Afr/Ap 19 Dec 003/004 Predicted Afr/Ap 20 Dec-22 Dec 006/006-004/005-004/005
VI. Geomagnetic Activity Probabilities 20 Dec to 22 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 01% | 01% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 01% | 01% |
All times in UTC
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