*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2026 May 10 06:29UTC Prepared by the Athens Space Weather Forecasting Center ***********************************************************************
I. Solar activity --Current Status Solar Flux (10.7cm) measured on 09.05.2026 at 23:00 UTC was 122 sfu. The background X-Ray flux is at the class B7.2 level. No obviously Earth directed CMEs were observed in available LASCO imagery on May 06-08. An equatorial coronal hole (CH1363) rotated across the central meridian on May 04-07. A coronal hole (CH1364) at northern hemisphere was Earth facing on May 07-09. A coronal hole (CH1365) at southern hemisphere will rotate across the central meridian on May 09-10.
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 537 Km/s on May 09 at 07:35 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 -3 nT on May 09 at 15:15 UT during the last 24 hours. The geomagnetic field was at quiet 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 May 10-12.
Date
Ap index forecast
Geomagnetic Activity level
10.05.2026
05
Quiet to Unsettled
11.05.2026
08
Quiet to Unsettled
12.05.2026
10
Quiet to Unsettled
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