Viewing archive of Saturday, 31 December 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 Dec 31 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 366 Issued at 2200Z on 31 Dec 2016IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 31-2100Z
Solar activity has been at very low levels for the past 24
hours. There are currently 1 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
on days one, two, and three (01 Jan, 02 Jan, 03 Jan).
IIA. Geophysical Activity Summary 30-2100Z to 31-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 588 km/s at 31/1958Z. Total IMF reached 19
nT at 31/1637Z. The maximum southward component of Bz reached -13 nT at
31/1156Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 7070 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (01 Jan), quiet to
unsettled levels on day two (02 Jan) and quiet to active levels on day
three (03 Jan).
III. Event Probabilities 01 Jan to 03 Jan
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 31 Dec 074 Predicted 01 Jan-03 Jan 074/074/074 90 Day Mean 31 Dec 080
V. Geomagnetic A Indices
Observed Afr/Ap 30 Dec 002/002 Estimated Afr/Ap 31 Dec 013/017 Predicted Afr/Ap 01 Jan-03 Jan 016/020-008/010-009/012
VI. Geomagnetic Activity Probabilities 01 Jan to 03 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 20% | 25% |
| Minor storm | 15% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 25% | 25% |
| Major-severe storm | 20% | 25% | 35% |
All times in UTC
Current data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future
Iqaluit, NUNuuk
Rovaniemi, Sodankylä, Utsjoki
Reykjavik
Tromsø
Kiruna
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