Viewing archive of Thursday, 21 January 2016
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 2016 Jan 21 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 21 Issued at 2200Z on 21 Jan 2016IA. Analysis of Solar Active Regions and Activity from 20-2100Z to 21-2100Z 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
21/0145Z from Region 2487 (S13E22). There are currently 3 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be low with a
slight chance for an M-class flare on days one, two, and three (22 Jan,
23 Jan, 24 Jan).
IIA. Geophysical Activity Summary 20-2100Z to 21-2100Z
The geomagnetic
field has been at unsettled to major storm levels for the past 24 hours.
Solar wind speed, as measured by the ACE spacecraft, reached a peak
speed of 547 km/s at 21/2031Z. Total IMF reached 20 nT at 21/0545Z. The
maximum southward component of Bz reached -19 nT at 21/0352Z. Electrons
greater than 2 MeV at geosynchronous orbit reached a peak level of 106
pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (22 Jan) and quiet to
unsettled levels on days two and three (23 Jan, 24 Jan).
III. Event Probabilities 22 Jan to 24 Jan
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 21 Jan 104 Predicted 22 Jan-24 Jan 105/105/110 90 Day Mean 21 Jan 109
V. Geomagnetic A Indices
Observed Afr/Ap 20 Jan 012/022 Estimated Afr/Ap 21 Jan 023/031 Predicted Afr/Ap 22 Jan-24 Jan 011/012-008/008-007/008
VI. Geomagnetic Activity Probabilities 22 Jan to 24 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 20% | 15% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 20% |
| Minor storm | 30% | 30% | 30% |
| Major-severe storm | 35% | 25% | 20% |
All times in UTC
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