***********************************************************************
Product: Daily Forecast of Geomagnetic Activity
Issued: 2025 May 13 15:56UTC
Prepared by the Athens Space Weather Forecasting Center
***********************************************************************

I. Solar activity
--Current Status
Solar Flux (10.7cm) measured on 12.05.2025 at 23:00 UTC was 116 sfu.
The background X-Ray flux is at the class X1.2 level.
No obviously Earth directed CMEs were observed in available LASCO imagery on May 10-11.
A coronal hole (CH1292) at northern hemisphere was Earth facing on May 07-08.
A coronal hole (CH1293) at southern hemisphere rotated across the central meridian on May 11-12.
A coronal hole (CH1294) at southern hemisphere will likely become Earth facing on May 15-18.

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 425 Km/s on May 13 at 09:15 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 -1 nT on May 12 at 11:40 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=2.

IV. 3-day Geomagnetic Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels on May 13-15.

Date	Ap index forecast	Geomagnetic Activity level	
13.05.2025	08	Quiet to Unsettled	
14.05.2025	08	Quiet to Unsettled	
15.05.2025	08	Quiet to Unsettled	

***************************************************************************
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
***************************************************************************