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Product: Daily Forecast of Geomagnetic Activity
Issued: 2021 January 25 06:37UTC
Prepared by the Athens Space Weather Forecasting Center
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1. Solar activity
Solar activity was increasing during the past 24 hours.
Solar Flux (10.7 cm) measured on 24.01.2021 at 20:00 UTC was 78 sfu.
The background X-Ray flux is at the class A5.6 level.
The geomagnetic field was at almost quiet levels on January 24.
No obviously Earth directed CMEs were observed in available LASCO imagery.
The Kp index now is at quiet levels with Kp=1.

2. Solar Wind Geomagnetic Activity
Solar Wind speed from ACE: 435 km/s.
Solar Wind speed from STEREO A: 400 km/s.
Solar Wind speed from STEREO B: --- km/s.
The southward component Bz is: 3 nT south.

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

4. Coronal Holes
A new coronal hole (CH989) was in Earth facing position on Jan. 21-22.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at almost quiet to unsettled levels on Jan. 25-26 and at quiet levels on Jan. 27.

Date Estimated Ap index Expected geom. storm
2021.01.25 05 -
2021.01.26 04 -
2021.01.27 02 -

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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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