Viewing archive of Saturday, 26 January 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 Jan 26 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 26 Issued at 2200Z on 26 Jan 2013IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 4 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
with a chance for a C-class flare on days one, two, and three (27 Jan,
28 Jan, 29 Jan).
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed at the ACE spacecraft peaked at 549 km/s at 26/1352Z. Total
IMF reached 15.9 nT at 26/1422Z. The maximum southward component of Bz
reached -12.7 nT at 25/2254Z. Electrons greater than 2 MeV reached a
peak flux of 118 pfu at geosynchronous orbit.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels for day one (27 Jan) decreasing to quiet
to unsettled levels for the remainder of the period (28 Jan, 29 Jan).
III. Event Probabilities 27 Jan to 29 Jan
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 26 Jan 099 Predicted 27 Jan-29 Jan 095/095/095 90 Day Mean 26 Jan 120
V. Geomagnetic A Indices
Observed Afr/Ap 25 Jan 007/007 Estimated Afr/Ap 26 Jan 013/017 Predicted Afr/Ap 27 Jan-29 Jan 013/020-007/008-005/005
VI. Geomagnetic Activity Probabilities 27 Jan to 29 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 10% | 10% |
| Minor storm | 10% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 20% | 15% |
| Major-severe storm | 40% | 10% | 10% |
All times in UTC
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