***********************************************************************
Product: Daily Forecast of Geomagnetic Activity
Issued: 2021 February 24 07:09UTC
Prepared by the Athens Space Weather Forecasting Center
***********************************************************************

1. Solar activity
Solar activity was decreasing stable during the past 24 hours.
Solar Flux (10.7 cm) measured on 23.02.2021 at 20:00 UTC was 72 sfu.
The background X-Ray flux is at the class A2.3 level.
The geomagnetic field was at quiet to active levels on February 23.
No obviously Earth directed CMEs were observed in available LASCO imagery.
The Kp index now is at active levels with Kp=4.

2. Solar Wind Geomagnetic Activity
Solar Wind speed from ACE: 470 km/s.
Solar Wind speed from STEREO A: --- km/s.
Solar Wind speed from STEREO B: --- km/s.
The southward component Bz is: 3 nT north.

3. Solar Energetic Particle Events
Protons and electrons are quiet.

4. Coronal Holes
A coronal hole (CH995) on the southern hemisphere of the visible solar disk was in Earth facing position on Feb. 17-18.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at unsettled to active levels on Feb. 24 and at quiet to unsettled levels on Feb. 25-26 due to the arrival of the CME associated with the Feb. 20 filament eruption and CH995 combined effects.

   Date      Estimated Ap index      Expected geom. storm
2021.02.24           18                        -
2021.02.25           15                        -
2021.02.26           10                        -

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