Viewing archive of Tuesday, 19 October 2021
Solar activity report
Report of Solar-Geophysical Activity 2021 Oct 19 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 292 Issued at 2200Z on 19 Oct 2021IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z 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 (20 Oct, 21 Oct, 22 Oct).
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 424 km/s at 19/1302Z. Total IMF reached 12
nT at 18/2144Z. The maximum southward component of Bz reached -7 nT at
19/1558Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 198 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (20 Oct), quiet to unsettled
levels on day two (21 Oct) and quiet levels on day three (22 Oct).
III. Event Probabilities 20 Oct to 22 Oct
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 19 Oct 076 Predicted 20 Oct-22 Oct 076/076/078 90 Day Mean 19 Oct 083
V. Geomagnetic A Indices
Observed Afr/Ap 18 Oct 009/010 Estimated Afr/Ap 19 Oct 012/015 Predicted Afr/Ap 20 Oct-22 Oct 010/012-009/010-007/008
VI. Geomagnetic Activity Probabilities 20 Oct to 22 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 25% | 25% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 15% |
| Minor storm | 30% | 30% | 30% |
| Major-severe storm | 35% | 30% | 30% |
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