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Solar activity report
Report of Solar-Geophysical Activity 2024 Sep 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 274 Issued at 2200Z on 30 Sep 2024IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C6 event observed at
29/2145Z from Region 3842 (S15E45). There are currently 9 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares and a slight chance for an X-class flare on
days one, two, and three (01 Oct, 02 Oct, 03 Oct).
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 547 km/s at 30/0301Z. Total IMF reached 13
nT at 29/2313Z. The maximum southward component of Bz reached -11 nT at
29/2348Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 218 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one, two, and three (01 Oct, 02 Oct, 03
Oct).
III. Event Probabilities 01 Oct to 03 Oct
| Class M | 50% | 50% | 50% |
| Class X | 10% | 10% | 10% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 30 Sep 214 Predicted 01 Oct-03 Oct 200/200/195 90 Day Mean 30 Sep 215
V. Geomagnetic A Indices
Observed Afr/Ap 29 Sep 017/015 Estimated Afr/Ap 30 Sep 011/014 Predicted Afr/Ap 01 Oct-03 Oct 005/005-006/005-005/005
VI. Geomagnetic Activity Probabilities 01 Oct to 03 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 15% | 15% | 15% |
All times in UTC
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Space weather facts
| Last X-flare | 2024/10/03 | X9.0 |
| Last M-flare | 2024/10/06 | M1.5 |
| Last geomagnetic storm | 2024/09/25 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| September 2024 | 141.4 -74.1 |
| October 2024 | 194.4 +53 |
| Last 30 days | 151.8 -38.8 |