Viewing archive of Sunday, 22 September 2024
Solar activity report
Report of Solar-Geophysical Activity 2024 Sep 22 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 266 Issued at 2200Z on 22 Sep 2024IA. Analysis of Solar Active Regions and Activity from 21-2100Z to 22-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C3 event observed at
22/1327Z from Region 3828 (S12W09). There are currently 7 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares on days one, two, and three (23 Sep, 24 Sep,
25 Sep).
IIA. Geophysical Activity Summary 21-2100Z to 22-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 447 km/s at 22/0301Z. Total IMF reached 7 nT at
22/1949Z. The maximum southward component of Bz reached -5 nT at
22/1938Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 2344 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one and two (23 Sep, 24 Sep) and quiet to
unsettled levels on day three (25 Sep).
III. Event Probabilities 23 Sep to 25 Sep
| Class M | 25% | 25% | 25% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 22 Sep 163 Predicted 23 Sep-25 Sep 160/160/160 90 Day Mean 22 Sep 214
V. Geomagnetic A Indices
Observed Afr/Ap 21 Sep 006/006 Estimated Afr/Ap 22 Sep 005/005 Predicted Afr/Ap 23 Sep-25 Sep 005/005-005/005-008/008
VI. Geomagnetic Activity Probabilities 23 Sep to 25 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 25% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 15% | 20% | 25% |
| Major-severe storm | 15% | 20% | 30% |
All times in UTC
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Space weather facts
| Last X-flare | 2024/09/14 | X4.54 |
| Last M-flare | 2024/09/22 | M3.7 |
| Last geomagnetic storm | 2024/09/17 | Kp8- (G4) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| August 2024 | 215.5 +19 |
| September 2024 | 146.1 -69.4 |
| Last 30 days | 151.7 -60.5 |