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Product: Daily Forecast of Geomagnetic Activity
Issued: 2026 August 02 07:33UTC
Prepared by the Athens Space Weather Forecasting Center
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I. Solar activity
--Current Status
Solar Flux (10.7cm) measured on 01.08.2026 at 23:00 UTC was 140 sfu.
The background X-Ray flux is at the class B8.0 level.
No obviously Earth directed CMEs were observed in available LASCO imagery on July 29 and 31.
---CME arrival forecast
A CME was observed on July 30 at 16:53 UT. This CME was expected to reach Earth between on August 01 at 23:21 UT and on August 02 at 10:21 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 337 Km/s on August 02 at 05:41 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 -4.02 nT on August 01 at 09:07 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 moderate storm (G2) levels on August 02 due to the effect of the CME from July 30, at quiet to active levels on August 03 and at quiet to unsettled levels on August 04.

DateAp index forecastGeomagnetic Activity level
02.08.202625Quiet to Moderate storm (G2)
03.08.202612Quiet to Active
04.08.202608Quiet 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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