Viewing archive of Sunday, 29 December 2013
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 2013 Dec 29 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 363 Issued at 2200Z on 29 Dec 2013IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M3 event observed at
29/0756Z from Region 1936 (S17W08). There are currently 6 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares on days one, two, and three (30 Dec, 31 Dec,
01 Jan).
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
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 414 km/s at
28/2300Z. Total IMF reached 8 nT at 28/2114Z. The maximum southward
component of Bz reached -5 nT at 28/2102Z. Protons greater than 10 MeV
at geosynchronous orbit reached a peak level of 29 pfu at 28/2315Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one and two (30 Dec, 31 Dec) and quiet to
unsettled levels on day three (01 Jan). Protons have a chance of
crossing threshold on days one, two, and three (30 Dec, 31 Dec, 01 Jan).
III. Event Probabilities 30 Dec to 01 Jan
| Class M | 35% | 35% | 35% |
| Class X | 05% | 05% | 05% |
| Proton | 25% | 25% | 25% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 29 Dec 137 Predicted 30 Dec-01 Jan 140/130/135 90 Day Mean 29 Dec 143
V. Geomagnetic A Indices
Observed Afr/Ap 28 Dec 004/002 Estimated Afr/Ap 29 Dec 004/005 Predicted Afr/Ap 30 Dec-01 Jan 006/005-006/005-009/010
VI. Geomagnetic Activity Probabilities 30 Dec to 01 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 15% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 20% |
| Minor storm | 15% | 15% | 25% |
| Major-severe storm | 05% | 05% | 20% |
All times in UTC
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