Viewing archive of Sunday, 30 May 2021
Solar activity report
Report of Solar-Geophysical Activity 2021 May 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 150 Issued at 2200Z on 30 May 2021IA. 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 2 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 (31
May, 01 Jun, 02 Jun).
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 491 km/s at 30/0838Z. Total IMF reached 6 nT at
29/2149Z. The maximum southward component of Bz reached -3 nT at
30/2005Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 350 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on day one (31 May) and quiet to active levels on
days two and three (01 Jun, 02 Jun).
III. Event Probabilities 31 May to 02 Jun
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 30 May 074 Predicted 31 May-02 Jun 072/072/072 90 Day Mean 30 May 077
V. Geomagnetic A Indices
Observed Afr/Ap 29 May 007/005 Estimated Afr/Ap 30 May 007/007 Predicted Afr/Ap 31 May-02 Jun 006/005-015/018-014/015
VI. Geomagnetic Activity Probabilities 31 May to 02 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 35% | 35% |
| Minor storm | 01% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 30% | 30% |
| Major-severe storm | 10% | 45% | 45% |
All times in UTC
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