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Product: Daily Forecast of Geomagnetic Activity
Issued: 2016 September 12 07:00UTC
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 11.09.2016 at 20:00 UTC was 86 sfu.
The background X-Ray flux is at the class B1 level.
The geomagnetic field was at very quiet levels on September 11.
No obviously Earth directed CMEs were observed in available LASCO imagery.
The Kp index now is at very quiet levels with Kp=2.

2. Solar Wind Geomagnetic Activity
Solar Wind speed from ACE: 310 km/s.
Solar Wind speed from STEREO A: 420 km/s.
Solar Wind speed from STEREO B: --- km/s.
The southward component Bz is: 9 nT north.

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

4. Coronal Holes
A decaying recurrent northern hemisphere coronal hole (CH760) will rotate into an Earth facing position on September 11-13. CH760 may be too far to the north to cause a disturbance.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels on September 12 and at quiet levels on September 13-14.

   Date      Estimated Ap index      Expected geom. storm
2016.09.12           9                        -
2016.09.13           5                        -
2016.09.14           4                        -

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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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