Viewing archive of Saturday, 27 January 2018
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 2018 Jan 27 2200 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 2018IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 0 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
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 reached a peak of 489 km/s at 26/2129Z. Total IMF reached 5
nT at 26/2147Z. The maximum southward component of Bz reached -4 nT at
27/1126Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 348 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on day one (28 Jan) and quiet to unsettled levels
on days two and three (29 Jan, 30 Jan).
III. Event Probabilities 28 Jan to 30 Jan
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 27 Jan 069 Predicted 28 Jan-30 Jan 069/069/069 90 Day Mean 27 Jan 071
V. Geomagnetic A Indices
Observed Afr/Ap 26 Jan 007/006 Estimated Afr/Ap 27 Jan 008/008 Predicted Afr/Ap 28 Jan-30 Jan 006/005-007/008-009/010
VI. Geomagnetic Activity Probabilities 28 Jan to 30 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 25% |
| Minor storm | 05% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 20% |
| Minor storm | 20% | 25% | 30% |
| Major-severe storm | 15% | 20% | 25% |
All times in UTC
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