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Solar activity report
Report of Solar-Geophysical Activity 2024 May 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 149 Issued at 2200Z on 28 May 2024IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z
Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C8 event observed at
28/1841Z from Region 3697 (S18E69). There are currently 9 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a chance for X-class flares on days one, two, and three (29 May, 30
May, 31 May).
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 389 km/s at 27/2307Z. Total IMF reached 7
nT at 28/1906Z. The maximum southward component of Bz reached -4 nT at
27/2206Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 327 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (29 May), quiet to unsettled
levels on day two (30 May) and quiet levels on day three (31 May).
Protons have a slight chance of crossing threshold on days one, two, and
three (29 May, 30 May, 31 May).
III. Event Probabilities 29 May to 31 May
| Class M | 60% | 60% | 60% |
| Class X | 30% | 30% | 30% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 28 May 166 Predicted 29 May-31 May 170/170/175 90 Day Mean 28 May 168
V. Geomagnetic A Indices
Observed Afr/Ap 27 May 009/009 Estimated Afr/Ap 28 May 007/008 Predicted Afr/Ap 29 May-31 May 009/012-009/008-006/005
VI. Geomagnetic Activity Probabilities 29 May to 31 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 20% | 10% |
| Minor storm | 15% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 30% | 30% | 20% |
| Major-severe storm | 50% | 25% | 20% |
All times in UTC
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