Viewing archive of Friday, 15 September 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Sep 15 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 258 Issued at 2200Z on 15 Sep 2023IA. Analysis of Solar Active Regions and Activity from 14-2100Z to 15-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M2 event observed at
14/2126Z from Region 3429 (N10E05). There are currently 6 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a slight chance for an M-class flare on days one, two, and three (16
Sep, 17 Sep, 18 Sep).
IIA. Geophysical Activity Summary 14-2100Z to 15-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 517 km/s at 14/2103Z. Total IMF reached 10
nT at 14/2100Z. The maximum southward component of Bz reached -5 nT at
15/1408Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 200 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and three (16 Sep, 18
Sep) and unsettled to active levels on day two (17 Sep).
III. Event Probabilities 16 Sep to 18 Sep
| Class M | 20% | 20% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 15 Sep 139 Predicted 16 Sep-18 Sep 140/140/135 90 Day Mean 15 Sep 162
V. Geomagnetic A Indices
Observed Afr/Ap 14 Sep 013/024 Estimated Afr/Ap 15 Sep 007/009 Predicted Afr/Ap 16 Sep-18 Sep 007/008-015/020-008/008
VI. Geomagnetic Activity Probabilities 16 Sep to 18 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 35% | 20% |
| Minor storm | 05% | 20% | 05% |
| Major-severe storm | 01% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 25% |
| Major-severe storm | 20% | 30% | 35% |
All times in UTC
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Space weather facts
| Last X-flare | 2024/10/31 | X2.0 |
| Last M-flare | 2024/11/05 | M2.6 |
| Last geomagnetic storm | 2024/10/12 | Kp5 (G1) |
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| Monthly mean Sunspot Number | |
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