Viewing archive of Thursday, 4 May 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 May 04 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 124 Issued at 2200Z on 04 May 2023IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M3 event observed at
04/0844Z from Region 3296 (N16E34). There are currently 8 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a slight chance for an X-class flare on day one (05 May) and
expected to be low with a chance for M-class flares and a slight chance
for an X-class flare on days two and three (06 May, 07 May).
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 468 km/s at 03/2138Z. Total IMF reached 5 nT at
03/2137Z. The maximum southward component of Bz reached -2 nT at
03/2154Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 6983 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on day one (05 May) and quiet to active levels on
days two and three (06 May, 07 May). Protons greater than 10 Mev have a
slight chance of crossing threshold on day one (05 May).
III. Event Probabilities 05 May to 07 May
| Class M | 55% | 50% | 50% |
| Class X | 15% | 10% | 10% |
| Proton | 10% | 05% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 04 May 162 Predicted 05 May-07 May 162/162/164 90 Day Mean 04 May 159
V. Geomagnetic A Indices
Observed Afr/Ap 03 May 004/004 Estimated Afr/Ap 04 May 006/006 Predicted Afr/Ap 05 May-07 May 006/005-011/014-011/014
VI. Geomagnetic Activity Probabilities 05 May to 07 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 20% | 25% |
| Minor storm | 01% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 15% | 20% | 20% |
| Major-severe storm | 10% | 30% | 30% |
All times in UTC
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