Viewing archive of Saturday, 22 December 2012
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 2012 Dec 22 2310 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 22 Dec 2012IA. Analysis of Solar Active Regions and Activity from 21-2100Z to 22-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C1 event observed at
21/2355Z from Region 1635 (N09E35). There are currently 3 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be low for the
next three days (23 - 25 December).
IIA. Geophysical Activity Summary 21-2100Z to 22-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed,
as measured by the ACE spacecraft, reached a peak speed of 433 km/s at
22/0251Z. Total IMF reached 3.7 nT at 22/1952Z. The maximum southward
component of Bz reached -2.7 nT at 22/0316Z. Electrons greater than 2
MeV at geosynchronous orbit reached a peak level of 190 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels for days one and two (23 - 24
December) due to effects from a co-rotating interaction region and
coronal hole high speed stream (CH HSS). Quiet conditions are expected
to return on day three (25 December) as CH HSS effects wane.
III. Event Probabilities 23 Dec to 25 Dec
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 22 Dec 115 Predicted 23 Dec-25 Dec 120/120/120 90 Day Mean 22 Dec 120
V. Geomagnetic A Indices
Observed Afr/Ap 21 Dec 003/003 Estimated Afr/Ap 22 Dec 002/003 Predicted Afr/Ap 23 Dec-25 Dec 006/008-008/008-005/005
VI. Geomagnetic Activity Probabilities 23 Dec to 25 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 15% |
| Minor storm | 15% | 20% | 10% |
| Major-severe storm | 05% | 10% | 05% |
All times in UTC
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