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Product: Daily Forecast of Geomagnetic Activity
Issued: 2018 December 05 08:05UTC
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 04.12.2018 at 20:00 UTC was 69 sfu.
The background X-Ray flux is at the class A4 level.
The geomagnetic field was at quiet to unsettled levels on December 4.
No obviously Earth directed CMEs were observed in available LASCO imagery.
The Kp index now is at almost levels with Kp=2.

2. Solar Wind Geomagnetic Activity
Solar Wind speed from ACE: 455 km/s.
Solar Wind speed from STEREO A: 340 km/s.
Solar Wind speed from STEREO B: --- km/s.
The southward component Bz is: 1 nT north.

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

4. Coronal Holes
An equatorial coronal hole (CH897) was in Earth facing position on November 26-29. A high speed stream of solar wind reached Earth on the first hours of December 1 as it was predicted with minor geomagnetic impact. A new equatorial coronal hole (CH898) will be in Earth facing position on December 4-5.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet levels, with a chance for unsettled and active intervals, on December 5 and at quiet levels on December 6-7.

   Date      Estimated Ap index      Expected geom. storm
2018.12.05           03                        -
2018.12.06           02                        -
2018.12.07           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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