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Product: Daily Forecast of Geomagnetic Activity
Issued: 2026 July 17 07:37UTC
Prepared by the Athens Space Weather Forecasting Center
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I. Solar activity
--Current Status
Solar Flux (10.7cm) measured on 16.07.2026 at 23:00 UTC was 101 sfu.
The background X-Ray flux is at the class B4.4 level.
No obviously Earth directed CMEs were observed in available LASCO imagery on July 13-15.
An equatorial coronal hole (CH1384) rotated across the central meridian on July 11.
A coronal hole (CH1385) at northern hemisphere was Earth facing on July 15.

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

III. Interplanetary and Geomagnetic conditions
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 -4.43 nT on July 16 at 10:43 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=1.

IV. 3-day Geomagnetic Activity Forecast
The geomagnetic field is expected to be at quiet levels on July 17 and 19 and at quiet to unsettled levels on July 18.

DateAp index forecastGeomagnetic Activity level
17.07.202605Quiet
18.07.202608Quiet to Unsettled
19.07.202605Quiet

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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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