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Product: Daily Forecast of Geomagnetic Activity
Issued: 2026 August 15 06:56UTC
Prepared by the Athens Space Weather Forecasting Center
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I. Solar activity
--Current Status
Solar Flux (10.7cm) measured on 14.08.2026 at 23:00 UTC was 114 sfu.
The background X-Ray flux is at the class B5.3 level.
No obviously Earth directed CMEs were observed in available LASCO imagery on August 11-13.
A coronal hole (CH1391) at northern hemisphere was Earth facing on August 10-12.

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 393 Km/s on August 14 at 23:50 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 -6.13 nT on August 14 at 12:57 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=2.

IV. 3-day Geomagnetic Activity Forecast
The geomagnetic field is expected to be at quiet to active levels on August 15 due to the effect of the coronal hole high speed stream, at quiet to unsettled levels on August 16 and at quiet levels on August 17.

DateAp index forecastGeomagnetic Activity level
15.08.202612Quiet to Active
16.08.202608Quiet to Unsettled
17.08.202605Quiet

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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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