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Product: Daily Forecast of Geomagnetic Activity
Issued: 2026 October 12 04:04UTC
Prepared by the Athens Space Weather Forecasting Center
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I. Solar activity
--Current Status
Solar Flux (10.7cm) measured on 11.10.2026 at 23:00 UTC was 122 sfu.
The background X-Ray flux is at the class B6.2 level.
No obviously Earth directed CMEs were observed in available LASCO imagery on October 09.
A coronal hole (CH1403) at southern hemisphere will rotate across the central meridian on October 07-12.
An equatorial coronal hole (CH1404) will be Earth facing on October 10-12.
---CME arrival forecast
A CME was observed on October 08 at 16:53 UT. This CME is expected to reach Earth between on October 11 at 18:14 UT and on October 12 at 03:28 UT according to EAM predictions.

II. Solar Energetic Particle Events
Protons and electrons fluxes are quiet.

III. Interplanetary and Geomagnetic conditions
The solar wind speed measured by ACE satellite reached the max value 690 Km/s on October 11 at 04:17 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 -02.05 nT on October 12 at 03:38 UT during the last 24 hours.
The geomagnetic field was at quiet to active levels during the last 24 hours.
The Kp index now is at quiet levels with Kp=2.

IV. 3-day Geomagnetic Activity Forecast
The geomagnetic field is expected to be at quiet to minor storm (G1) levels on October 12-14 due to the CH1404.

DateAp index forecastGeomagnetic Activity level
12.10.202615Quiet to Minor Storm (G1)
13.10.202625Quiet to Minor Storm (G1)
14.10.202615Quiet to Minor Storm (G1)

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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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