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Product: Daily Forecast of Geomagnetic Activity
Issued: 2021 June 27 11:29UTC
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 26.06.2021 at 20:00 UTC was 82 sfu.
The background X-Ray flux is at the class B1.5 level.
The geomagnetic field was at very quiet levels on June 26.
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: 350 km/s.
Solar Wind speed from STEREO A: 420 km/s.
Solar Wind speed from STEREO B: --- km/s.
The southward component Bz is: 2 nT south.

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

4. Coronal Holes
A small coronal hole (CH1018) on the northern hemisphere of the visible solar disk will be in Earth facing position on June 27.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at very quiet levels on June 27-29.

   Date      Estimated Ap index      Expected geom. storm
2021.06.27           03                        -
2021.06.28           02                        -
2021.06.29           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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