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Product: Daily Forecast of Geomagnetic Activity
Issued: 2016 May 10 06:20UTC
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 09.05.2016 at 20:00 UTC was 89 sfu.
The background X-Ray flux is at the class B2 level.
The geomagnetic field was at unsettled to major storm levels on May 9.
No obviously Earth directed CMEs were observed in available LASCO imagery.
The Kp index now is at active levels with Kp=4.

2. Solar Wind Geomagnetic Activity
Solar Wind speed from ACE: 590 km/s.
Solar Wind speed from STEREO A: 460 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 recurrent trans equatorial coronal hole (CH733) was Earth facing on May 5-7. A recurrent northern hemisphere coronal hole (CH734) will likely rotate across the central meridian on May 12-13, no disturbance was associated with the CH on the previous rotation.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at unsettled to active levels on May 10-12.

    Date         Estimated Geomagnetic Ap index
2016.05.10                    20
2016.05.11                    18
2016.05.12                    13

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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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