Viewing archive of Sunday, 29 September 2024
Solar activity report
Report of Solar-Geophysical Activity 2024 Sep 29 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 273 Issued at 2200Z on 29 Sep 2024IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M1 event observed at
29/1424Z from Region 3842 (S15E45). There are currently 9 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
(30 Sep, 01 Oct, 02 Oct).
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 486 km/s at 29/2044Z. Total IMF reached 14
nT at 29/1451Z. The maximum southward component of Bz reached -10 nT at
29/1951Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 574 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (30 Sep) and quiet levels on
days two and three (01 Oct, 02 Oct).
III. Event Probabilities 30 Sep to 02 Oct
| Class M | 55% | 55% | 55% |
| Class X | 10% | 10% | 10% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 29 Sep 197 Predicted 30 Sep-02 Oct 200/200/200 90 Day Mean 29 Sep 214
V. Geomagnetic A Indices
Observed Afr/Ap 28 Sep 005/007 Estimated Afr/Ap 29 Sep 013/015 Predicted Afr/Ap 30 Sep-02 Oct 009/010-005/005-006/005
VI. Geomagnetic Activity Probabilities 30 Sep to 02 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 10% | 10% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 15% | 15% |
| Major-severe storm | 45% | 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 |