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Product: Daily Forecast of Geomagnetic Activity
Issued: 2023 August 20 08:29UTC
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 19.08.2023 at 20:00 UTC was 151 sfu.
The background X-Ray flux is at the class B9.0 level.
The geomagnetic field was at quiet to unsettled levels on August 19.
No obviously Earth directed CMEs were observed in available LASCO imagery.
The Kp index now is at unsettled levels with Kp=3.

2. Solar Wind Geomagnetic Activity
Solar Wind speed from ACE: 640 km/s.
Solar Wind speed from STEREO A: - km/s.
Solar Wind speed from STEREO B: - km/s.
The southward component Bz is: 5 nT north.

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

4. Coronal Holes
No obvious coronal holes are currently in the visible solar disk.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels on August 20-21 and quiet levels on August 22.

   Date      Estimated Ap index      Expected geom. storm
2023.08.20           10                        -
2023.08.21           08                        -
2023.08.22           05                        -

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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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