Space Weather Report
Space Weather Report
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Product: Daily Forecast of Geomagnetic Activity
Issued: 2026 September 11 03:59UTC
Prepared by the Athens Space Weather Forecasting Center
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I. Solar activity
--Current Status
Solar Flux (10.7cm) measured on10.09.2026 at 23:00 UTC was 115 sfu.
The background X-Ray flux is at the class B4.3 level.
No obviously Earth directed CMEs were observed in available LASCO imagery on September 07-09.
A small equatorial coronal hole (CH1397) rotated across the central meridian on September 08.
A coronal hole (CH1398) at southern hemisphere will be Earth facing on September 10-14.
A coronal hole (CH1399) at northern hemisphere will rotate across the central meridian on September 12-14.
II. Solar Energetic Particle Events
Protons fluxes are quiet.
The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm level on September 10.
III. Interplanetary and Geomagnetic conditions
The solar wind speed measured by ACE satellite reached the max value 502 Km/s on September 10 at 16:32 UT during the last 24 hours.
The solar wind speed from STEREO A was detected 400 Km/s during the last 24 hours.
The vertical component of IMF Bz reached the max value -4.63 nT on September 10 at 13:56 UT during the last 24 hours.
The geomagnetic field was at quiet to unsettled levels during the last 24 hours.
The Kp index now is at quiet levels with Kp=1.
IV. 3-day Geomagnetic Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels on September 11-13.
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Athens Space Weather Forecasting Center
Physics Department, National & Kapodistrian University of Athens
Athens Neutron Monitor Station A.NE.MO.S
Tel.: +30 210 727 6901
email: spaceweather@phys.uoa.gr
URL: http://spaceweather.phys.uoa.gr
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Product: Daily Forecast of Geomagnetic Activity
Issued: 2026 September 11 03:59UTC
Prepared by the Athens Space Weather Forecasting Center
***********************************************************************
I. Solar activity
--Current Status
Solar Flux (10.7cm) measured on10.09.2026 at 23:00 UTC was 115 sfu.
The background X-Ray flux is at the class B4.3 level.
No obviously Earth directed CMEs were observed in available LASCO imagery on September 07-09.
A small equatorial coronal hole (CH1397) rotated across the central meridian on September 08.
A coronal hole (CH1398) at southern hemisphere will be Earth facing on September 10-14.
A coronal hole (CH1399) at northern hemisphere will rotate across the central meridian on September 12-14.
II. Solar Energetic Particle Events
Protons fluxes are quiet.
The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm level on September 10.
III. Interplanetary and Geomagnetic conditions
The solar wind speed measured by ACE satellite reached the max value 502 Km/s on September 10 at 16:32 UT during the last 24 hours.
The solar wind speed from STEREO A was detected 400 Km/s during the last 24 hours.
The vertical component of IMF Bz reached the max value -4.63 nT on September 10 at 13:56 UT during the last 24 hours.
The geomagnetic field was at quiet to unsettled levels during the last 24 hours.
The Kp index now is at quiet levels with Kp=1.
IV. 3-day Geomagnetic Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels on September 11-13.
| Date | Ap index forecast | Geomagnetic Activity level |
|---|---|---|
| 11.09.2026 | 08 | Quiet to Unsettled |
| 12.09.2026 | 08 | Quiet to Unsettled |
| 13.09.2026 | 08 | Quiet to Unsettled |
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Athens Space Weather Forecasting Center
Physics Department, National & Kapodistrian University of Athens
Athens Neutron Monitor Station A.NE.MO.S
Tel.: +30 210 727 6901
email: spaceweather@phys.uoa.gr
URL: http://spaceweather.phys.uoa.gr
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