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Product: Daily Forecast of Geomagnetic Activity
Issued: 2015 May 12 05:47UTC
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 11.05.2015 at 20:00 UTC was 163 sfu.
The background X-Ray flux is at the class B6 level.
The geomagnetic field was at quiet to active levels on May 11.
No obviously Earth directed CMEs were observed.
The Kp index now is at unsettled levels with Kp=3.

2. Solar Wind Geomagnetic Activity
Solar wind speed from ACE: 350 km/s.
Solar wind speed from STEREO A: --- km/s.
Solar wind speed from STEREO B: --- km/s.
The southward component of Bz is: 2.0 nT south.

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

4. Coronal Holes
A recurrent extension (CH667) of the southern polar coronal hole rotated across the central meridian on May 8-9 and may be associated with a co-rotating interaction region. A recurrent southern hemipshere coronal hole (CH668) will probably rotate into an Earth facing position on May 14-15.

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

    Date         Estimated Geomagnetic Ap index
2015.05.12                      18
2015.05.13                      19
2015.05.14                      16

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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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