Viewing archive of Tuesday, 27 January 2015
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 2015 Jan 27 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 27 Issued at 2200Z on 27 Jan 2015IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z
Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C2 event observed at
27/0547Z from Region 2273 (S03W12). 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 and a slight chance for an X-class flare on
days one, two, and three (28 Jan, 29 Jan, 30 Jan).
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
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
530 km/s at 27/1633Z. Total IMF reached 12 nT at 27/0526Z. The maximum
southward component of Bz reached -9 nT at 27/0432Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 102 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (28 Jan) and quiet to
active levels on days two and three (29 Jan, 30 Jan).
III. Event Probabilities 28 Jan to 30 Jan
| Class M | 40% | 40% | 40% |
| Class X | 10% | 10% | 10% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 27 Jan 158 Predicted 28 Jan-30 Jan 165/170/170 90 Day Mean 27 Jan 151
V. Geomagnetic A Indices
Observed Afr/Ap 26 Jan 012/012 Estimated Afr/Ap 27 Jan 011/012 Predicted Afr/Ap 28 Jan-30 Jan 008/010-011/012-014/015
VI. Geomagnetic Activity Probabilities 28 Jan to 30 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 30% | 30% |
| Minor storm | 05% | 10% | 15% |
| Major-severe storm | 01% | 01% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 30% | 30% |
| Major-severe storm | 30% | 40% | 45% |
All times in UTC
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