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Product: Daily Forecast of Geomagnetic Activity
Issued: 2023 April 10 05:45UTC
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 09.04.2023 at 20:00 UTC was 140 sfu.
The background X-Ray flux is at the class C4.3 level.
The geomagnetic field was at quiet to unsettled levels on April 09.
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: 328 km/s.
Solar Wind speed from STEREO A: 420 km/s.
Solar Wind speed from STEREO B: - km/s.
The southward component Bz is: 6 nT south.

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

4. Coronal Holes
A coronal hole (CH1140) at northern hemisphere will become Earth facing on April 07-08.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels with isolated active periods on April 10-12 due to the effect of coronal hole (CH1140) high speed stream

   Date      Estimated Ap index      Expected geom. storm
2023.04.10           10                        -
2023.04.11           12                        -
2023.04.12           12                        -

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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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