Viewing archive of Thursday, 19 December 2019
Solar activity report
Report of Solar-Geophysical Activity 2019 Dec 18 2215 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 352 Issued at 2200Z on 19 Dec 2019IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z 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 (19 Dec, 20 Dec, 21 Dec).
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 578 km/s at 18/1929Z. Total IMF reached 12
nT at 18/1025Z. The maximum southward component of Bz reached -10 nT at
18/1029Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (19 Dec) and quiet to
unsettled levels on days two and three (20 Dec, 21 Dec).
III. Event Probabilities 19 Dec to 21 Dec
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 18 Dec 070 Predicted 19 Dec-21 Dec 070/070/070 90 Day Mean 18 Dec 069
V. Geomagnetic A Indices
Observed Afr/Ap 17 Dec 002/002 Estimated Afr/Ap 18 Dec 010/012 Predicted Afr/Ap 19 Dec-21 Dec 010/010-008/008-008/008
VI. Geomagnetic Activity Probabilities 19 Dec to 21 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 20% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 30% | 30% |
| Major-severe storm | 35% | 25% | 25% |
All times in UTC
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