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Product: Daily Forecast of Geomagnetic Activity
Issued: 2025 February 09 20:38UTC
Prepared by the Athens Space Weather Forecasting Center
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I. Solar activity
--Current Status
Solar Flux (10.7cm) measured on 08.02.2025 at 23:00 UTC was 173 sfu.
The background X-Ray flux is at the class C2.4 level.
AR3981 erupted on February 08 at 09:27 UT peak time producing a M2.1-class solar flare and a radio blackout of category R1.
No obviously Earth directed CMEs were observed in available LASCO imagery on February 06-08.
An equatorial coronal hole (CH1269) rotated across the central meridian on February 06-08.

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 551 Km/s on February 09 at 19:25 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 -15 nT on February 09 at 14:25 UT during the last 24 hours.
The geomagnetic field was at quiet to active levels during the last 24 hours.
The Kp index now is at active levels with Kp=4.

IV. 3-day Geomagnetic Activity Forecast
The geomagnetic field is expected to be at quiet to active levels on February 09 and 11 and at quiet to minor storm (G1) levels on February 10.

Date	Ap index forecast	Geomagnetic Activity level	
09.02.2025	15	Quiet to Active	
10.02.2025	20	Quiet to Minor storm (G1)	
11.02.2025	15	Quiet to Active	

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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
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