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Product: Daily Forecast of Geomagnetic Activity
Issued: 2025 July 12 06:25UTC
Prepared by the Athens Space Weather Forecasting Center
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I. Solar activity--Current StatusSolar Flux (10.7cm) measured on 11.07.2025 at 23:00 UTC was 132 sfu.
The background X-Ray flux is at the class C2.8 level.
No obviously Earth directed CMEs were observed in available LASCO imagery on July 00-11.
An equatorial coronal hole (CH1306) will be Earth facing on July 08-14.
II. Solar Energetic Particle EventsProtons and electrons fluxes are quiet.
III. Interplanetary and Geomagnetic conditionsThe solar wind speed measured by ACE satellite reached the max value 497 Km/s on July 11 at 21:40 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 -10 nT on July 11 at 09:25 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 unsettled levels with Kp=3.
IV. 3-day Geomagnetic Activity ForecastThe geomagnetic field is expected to be at quiet to unsettled levels with isolated active periods on July 12-14 due to the effect of the recurrent coronal hole high speed stream.
Date | Ap index forecast | Geomagnetic Activity level |
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12.07.2025 | 12 | Quiet to Unsettled |
13.07.2025 | 15 | Quiet to Unsettled |
14.07.2025 | 10 | 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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