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Product: Daily Forecast of Geomagnetic Activity
Issued: 2018 June 03 06:02UTC
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 02.06.2018 at 20:00 UTC was 74 sfu.
The background X-Ray flux is at the class A7 level.
The geomagnetic field was at almost quiet to active levels on June 02.
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: 625 km/s.
Solar Wind speed from STEREO A: 280 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 coronal hole (CH867) close to the equator of the visible solar disk will be in Earth facing position on May 29-31. A high speed stream of solar wind reached Earth on the second half of May 31, earlier than it was predicted.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at unsettled to active levels on June 03 and at quiet to unsettled levels on June 04-05, due to CH867 effects.

   Date      Estimated Ap index      Expected geom. storm
2018.06.03           12                        -
2018.06.04           09                        -
2018.06.05           07                        -

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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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