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Product: Daily Forecast of Geomagnetic Activity
Issued: 2017 April 15 06:19UTC
Prepared by the Athens Space Weather Forecasting Center
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1. Solar activity
Solar activity was increasing during the past 24 hours.
Solar Flux (10.7 cm) measured on 14.04.2017 at 20:00 UTC was 73 sfu.
The background X-Ray flux is at the class A3 level.
The geomagnetic field was at almost quiet to active levels on April 14. 
No obviously Earth directed CMEs were observed in available LASCO imagery.
The Kp index now is at almost quiet levels with Kp=2.

2. Solar Wind Geomagnetic Activity
Solar Wind speed from ACE: 340 km/s.
Solar Wind speed from STEREO A: 600 km/s.
Solar Wind speed from STEREO B: --- km/s.
The southward component Bz is: 1 nT north.

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

4. Coronal Holes
A new southern hemisphere coronal hole (CH801)  will be in Earth facing position on April 13-14. A high speed stream from this CH should arrive on Earth on first half of April 16.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels on April 15, at quiet to active on April 16 and at unsettled to minor storm levels on April 17 due to CH801 effects.

   Date      Estimated Ap index      Expected geom. storm
2017.04.15           10                        -
2017.04.16           14                        G1
2017.04.17           22                        G1

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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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