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Solar activity report
Report of Solar-Geophysical Activity 2024 May 23 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 144 Issued at 2200Z on 23 May 2024IA. Analysis of Solar Active Regions and Activity from 22-2100Z to 23-2100Z Solar activity has been at high levels for the past 24 hours.
The largest solar event of the period was a M4 event observed at
23/0216Z from Region 3679 (S09W73). There are currently 7 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 days one, two, and three
(24 May, 25 May, 26 May).
IIA. Geophysical Activity Summary 22-2100Z to 23-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 419 km/s at 23/0307Z. Total IMF reached 8
nT at 23/1940Z. The maximum southward component of Bz reached -8 nT at
23/2000Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 489 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and three (24 May, 26 May)
and quiet to unsettled levels on day two (25 May). Protons have a slight
chance of crossing threshold on day one (24 May) and have a slight
chance of crossing threshold on days two and three (25 May, 26 May).
III. Event Probabilities 24 May to 26 May
| Class M | 60% | 60% | 55% |
| Class X | 10% | 10% | 10% |
| Proton | 15% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 23 May 176 Predicted 24 May-26 May 175/175/170 90 Day Mean 23 May 169
V. Geomagnetic A Indices
Observed Afr/Ap 22 May 005/005 Estimated Afr/Ap 23 May 006/007 Predicted Afr/Ap 24 May-26 May 013/015-012/012-010/012
VI. Geomagnetic Activity Probabilities 24 May to 26 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 25% | 30% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 25% | 25% |
| Major-severe storm | 40% | 35% | 40% |
All times in UTC
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Space weather facts
| Last X-flare | 2024/11/06 | X2.3 |
| Last M-flare | 2024/11/08 | M1.4 |
| Last geomagnetic storm | 2024/10/12 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| October 2024 | 166.4 +25 |
| November 2024 | 190.1 +23.7 |
| Last 30 days | 160.2 +7.9 |