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Product: Daily Forecast of Geomagnetic Activity
Issued: 2015 December 09 08:12UTC
Prepared by the Athens Space Weather Forecasting Center
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1. Solar activity
Solar activity was almost stable during the past 24 hours.
Solar Flux (10.7 cm) measured on 08.12.2015 at 20:00 UTC was 106 sfu.
The background X-Ray flux is at the class B4 level.
The geomagnetic field was at quiet to unsettled levels on December 8.
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: 470 km/s.
Solar Wind speed from STEREO A: 395 km/s.
Solar Wind speed from STEREO B: --- km/s.
The southward component of Bz is: 2 nT north.

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

4. Coronal Holes
A large recurrent northern hemisphere coronal hole (CH704) with a very long trans equatorial extension was in an Earth facing position on December 2-8. A recurrent northern hemisphere coronal hole (CH705) will likely rotate across the central meridian on December 11-12.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to active levels on Dec. 9 and at unsettled to minor storm levels on Dec. 10-11.

    Date         Estimated Geomagnetic Ap index
2015.12.09                    9
2015.12.10                    25
2015.12.11                    20

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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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