Space Weather Report

Athens Cosmic Ray Station
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Product: Daily Forecast of Geomagnetic Activity
Issued: 2026 October 06 03:30UTC
Prepared by the Athens Space Weather Forecasting Center
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I. Solar activity
--Current Status
Solar Flux (10.7cm) measured on 05.10.2026 at 23:00 UTC was 100 sfu.
The background X-Ray flux is at the class B9.8 level.
AR4545 erupted on October 05 at 18:48 UT peak time producing a M1.1-class solar flare and a radio blackout of category R1.
No obviously Earth directed CMEs were observed in available LASCO imagery on October 02-04.
An equatorial coronal hole (CH1402) was Earth facing on September 30-October 02.
A coronal hole (CH1403) at southern hemisphere will likely rotate across the central meridian on October 07-08.

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 October 05 at 08:13 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 -5.88 nT on October 05 at 05:58 UT during the last 24 hours.
The geomagnetic field was at quiet to minor storm (G1) levels during the last 24 hours.
The Kp index now is at unsettled levels with Kp=3.

IV. 3-day Geomagnetic Activity Forecast
The geomagnetic field is expected to be at quiet to active levels on October 06 due to the continuous effects of the coronal hole (CH1402) and at quiet to unsettled levels on October 07-08.

DateAp index forecastGeomagnetic Activity level
06.10.202614Quiet to Active
07.10.202608Quiet to Unsettled
08.10.202608Quiet 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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