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Product: Daily Forecast of Geomagnetic Activity
Issued: 2021 August 06 05:50UTC
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 05.08.2021 at 20:00 UTC was 74 sfu.
The background X-Ray flux is at the class B1.1 level.
The geomagnetic field was at very quiet levels on August 5.
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: 315 km/s.
Solar Wind speed from STEREO A: 330 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
There are two coronal hole structures (CH1023, CH1024) on the visible solar disk which will be in Earth facing positions on Aug 3-6.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels on Aug. 6-8 with a chance for active intervals due to CIRs.

   Date      Estimated Ap index      Expected geom. storm
2021.08.06           08                        -
2021.08.07           09                        -
2021.08.08           10                        -

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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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