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Product: Daily Forecast of Geomagnetic Activity
Issued: 2026 June 05 14:07UTC
Prepared by the Athens Space Weather Forecasting Center
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I. Solar activity
--Current Status
Solar Flux (10.7cm) measured on 04.06.2026 at 23:00 UTC was 148 sfu.
The background X-Ray flux is at the class C1.0 level.
No obviously Earth directed CMEs were observed in available LASCO imagery on June 01-02.
An equatorial coronal hole (CH1372) was Earth facing on May 31-June 01.
Multiple CMEs were observed on June 03.These CMEs could reach Earth after noon on June 04 or on June 05.

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 638 Km/s on June 05 at 12:40 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 -17 nT on June 05 at 12:30 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 June 05-06 due to the effect of multiple CMEs on June 03 and at quiet to unsettled levels on June 07.

DateAp index forecastGeomagnetic Activity level
05.06.202618Quiet to Active
06.06.202615Quiet to Active
07.06.202608Quiet 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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