***********************************************************************
Product: Daily Forecast of Geomagnetic Activity
Issued: 2026 October 24 08:44UTC
Prepared by the Athens Space Weather Forecasting Center
***********************************************************************

I. Solar activity
--Current Status
Solar Flux (10.7cm) measured on 23.10.2026 at 23:00 UTC was 101 sfu.
The background X-Ray flux is at the class B6.4 level.
No obviously Earth directed CMEs were observed in available LASCO imagery on October 21-23.
A coronal hole (CH1406) at northern hemisphere was Earth facing on October 19-20.
An equatorial coronal hole CH1407 was in an Earth facing position on October 21.
An equatorial coronal hole (CH1408) will likely rotate across the central meridian on October 27-28.
---CME arrival forecast
A CME was observed on October 21 at 08:53 UT. This CME is expected to reach Earth between on October 24 at 14:27 UT and on October 25 at 10:02 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 581 Km/s on October 23 at 12:07 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 -5.11 nT on October 23 at 11:00 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=1.

IV. 3-day Geomagnetic Activity Forecast
The geomagnetic field is expected to be at quiet to active levels on October 24-25 and at quiet to unsettled levels on October 26.

DateAp index forecastGeomagnetic Activity level
24.10.202612Quiet to Active
25.10.202615Quiet to Active
26.10.202606Quiet to Unsettled

***************************************************************************
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
***************************************************************************