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Product: Daily Forecast of Geomagnetic Activity
Issued: 2015 September 16 06:26UTC
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 15.09.2015 at 20:00 UTC was 101 sfu.
The background X-Ray flux is at the class B3 level.
The geomagnetic field was at quiet to active levels on September 15.
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: 360 km/s.
Solar Wind speed from STEREO B: --- km/s.
The southward component of Bz is: 1 nT south.

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

4. Coronal Holes
A large northern hemisphere coronal hole (CH689) will be in an Earth facing position on September 9-16. A recurrent trans equatorial coronal hole (CH690) will rotate into an Earth facing position on September 16-17.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels on September 16-18.

    Date         Estimated Geomagnetic Ap index
2015.09.16                    10
2015.09.17                    9
2015.09.18                    9

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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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