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Product: Daily Forecast of Geomagnetic Activity
Issued: 2018 February 20 08:36UTC
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 19.02.2018 at 20:00 UTC was 69 sfu.
The background X-Ray flux is at the class A2 level.
The geomagnetic field was at almost quiet to minor storm levels on February 19.
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: 460 km/s.
Solar Wind speed from STEREO A: 400 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
The coronal hole CH851 was in Earth facing position on February 12-17.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels, with a chance for active intervals, on February 20-21 due to the CH851 effects and at quiet levels on February 22.

Date Estimated Ap index Expected geom. storm
2018.02.20 06 -
2018.02.21 05 -
2018.02.22 04 -

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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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