Viewing archive of Monday, 27 April 2020
Solar activity report
Report of Solar-Geophysical Activity 2020 Apr 27 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 118 Issued at 2200Z on 27 Apr 2020IA. 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 1 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
with a slight chance for a C-class flare on days one, two, and three (28
Apr, 29 Apr, 30 Apr).
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 450 km/s at 27/2009Z. Total IMF reached 5
nT at 26/2148Z. The maximum southward component of Bz reached -4 nT at
27/1628Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 164 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one, two, and three (28 Apr,
29 Apr, 30 Apr).
III. Event Probabilities 28 Apr to 30 Apr
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 27 Apr 069 Predicted 28 Apr-30 Apr 070/070/070 90 Day Mean 27 Apr 070
V. Geomagnetic A Indices
Observed Afr/Ap 26 Apr 005/006 Estimated Afr/Ap 27 Apr 007/008 Predicted Afr/Ap 28 Apr-30 Apr 007/008-008/008-007/008
VI. Geomagnetic Activity Probabilities 28 Apr to 30 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 20% |
| Major-severe storm | 20% | 20% | 20% |
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