Viewing archive of Thursday, 9 April 2020
Solar activity report
Report of Solar-Geophysical Activity 2020 Apr 09 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 100 Issued at 2200Z on 09 Apr 2020IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z 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 (10 Apr, 11 Apr, 12 Apr).
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 486 km/s at 09/0012Z. Total IMF reached 5
nT at 09/0544Z. The maximum southward component of Bz reached -4 nT at
09/0955Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 183 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (10 Apr), quiet to active
levels on day two (11 Apr) and quiet levels on day three (12 Apr).
III. Event Probabilities 10 Apr to 12 Apr
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 09 Apr 070 Predicted 10 Apr-12 Apr 070/070/070 90 Day Mean 09 Apr 071
V. Geomagnetic A Indices
Observed Afr/Ap 08 Apr 010/011 Estimated Afr/Ap 09 Apr 004/005 Predicted Afr/Ap 10 Apr-12 Apr 007/008-010/012-006/005
VI. Geomagnetic Activity Probabilities 10 Apr to 12 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 35% | 10% |
| Minor storm | 05% | 10% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 30% | 20% |
| Major-severe storm | 25% | 45% | 10% |
All times in UTC
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