Viewing archive of Thursday, 30 April 2020
Solar activity report
Report of Solar-Geophysical Activity 2020 Apr 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 121 Issued at 2200Z on 30 Apr 2020IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 3 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 (01
May, 02 May, 03 May).
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 333 km/s at 29/2210Z. Total IMF reached 5 nT at
30/2051Z. The maximum southward component of Bz reached -2 nT at
29/2214Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 179 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one and two (01 May, 02 May) and quiet to
unsettled levels on day three (03 May).
III. Event Probabilities 01 May to 03 May
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 30 Apr 070 Predicted 01 May-03 May 070/070/070 90 Day Mean 30 Apr 070
V. Geomagnetic A Indices
Observed Afr/Ap 29 Apr 004/002 Estimated Afr/Ap 30 Apr 002/003 Predicted Afr/Ap 01 May-03 May 006/005-006/005-007/008
VI. Geomagnetic Activity Probabilities 01 May to 03 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 25% |
| Major-severe storm | 10% | 10% | 25% |
All times in UTC
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