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Product: Daily Forecast of Geomagnetic Activity
Issued: 2017 May 30 09:55UTC
Prepared by the Athens Space Weather Forecasting Center
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1. Solar activity
Solar activity was decreasing stable during the past 24 hours.
Solar Flux (10.7 cm) measured on 29.05.2017 at 20:00 UTC was 76 sfu.
The background X-Ray flux is at the class A9 level.
The geomagnetic field was at quiet to active levels on May 29.
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: 560 km/s.
Solar Wind speed from STEREO A: 360 km/s.
Solar Wind speed from STEREO B: --- km/s.
The southward component Bz is: 3 nT north.

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

4. Coronal Holes
A new equatorial coronal hole was in Earth facing position on May 29-30. A high speed stream of solar wind will reach Earth on the second half of June 1.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to active levels on May 30 - June 1.

   Date      Estimated Ap index      Expected geom. storm
2017.05.30           08                        -
2017.05.31           07                        -
2017.06.01           10                        -

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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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