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Solar activity report
Report of Solar-Geophysical Activity 2024 Jun 21 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 173 Issued at 2200Z on 21 Jun 2024IA. Analysis of Solar Active Regions and Activity from 20-2100Z to 21-2100Z
Solar activity has been at high levels for the past 24 hours.
The largest solar event of the period was a M5 event observed at
20/2316Z from Region 3719 (S13E55). 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
(22 Jun, 23 Jun, 24 Jun).
IIA. Geophysical Activity Summary 20-2100Z to 21-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 455 km/s at 21/0058Z. Total IMF reached 5 nT at
21/0227Z. The maximum southward component of Bz reached -3 nT at
21/1805Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 629 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (22 Jun), quiet to unsettled
levels on day two (23 Jun) and quiet levels on day three (24 Jun).
Protons have a slight chance of crossing threshold on days one, two, and
three (22 Jun, 23 Jun, 24 Jun).
III. Event Probabilities 22 Jun to 24 Jun
| Class M | 60% | 60% | 60% |
| Class X | 15% | 15% | 15% |
| Proton | 15% | 15% | 15% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 21 Jun 197 Predicted 22 Jun-24 Jun 200/190/190 90 Day Mean 21 Jun 176
V. Geomagnetic A Indices
Observed Afr/Ap 20 Jun 008/008 Estimated Afr/Ap 21 Jun 008/010 Predicted Afr/Ap 22 Jun-24 Jun 011/012-008/010-005/005
VI. Geomagnetic Activity Probabilities 22 Jun to 24 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 20% | 10% |
| Minor storm | 10% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 25% | 20% |
| Major-severe storm | 40% | 30% | 20% |
All times in UTC
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Space weather facts
| Last X-flare | 2025/05/14 | X2.7 |
| Last M-flare | 2025/05/19 | M3.1 |
| Last geomagnetic storm | 2025/05/17 | Kp6+ (G2) |
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| Monthly mean Sunspot Number | |
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