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Product: Daily Forecast of Geomagnetic Activity
Issued: 2021 January 15 07:08UTC
Prepared by the Athens Space Weather Forecasting Center
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1. Solar activity
Solar activity was decreasing stable during the past 24 hours.
Solar Flux (10.7 cm) measured on 14.01.2021 at 20:00 UTC was 74 sfu.
The background X-Ray flux is at the class A1.5 level.
The geomagnetic field was at very quiet levels on January 14.
No obviously Earth directed CMEs were observed in available LASCO imagery.
The Kp index now is at very quiet levels with Kp=0.

2. Solar Wind Geomagnetic Activity
Solar Wind speed from ACE: 300 km/s.
Solar Wind speed from STEREO A: 350 km/s.
Solar Wind speed from STEREO B: --- km/s.
The southward component Bz is: 0 nT.

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

4. Coronal Holes
A large south polar coronal hole was in Earth facing position but due to the position probably will not be geoeffective. A new coronal hole (CH988) on the northern hemisphere will be in Earth facing position on Jan.  15-17.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at very quiet levels on Jan. 15-17.

   Date      Estimated Ap index      Expected geom. storm
2021.01.15           01                        -
2021.01.16           00                        -
2021.01.17           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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