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Product: Daily Forecast of Geomagnetic Activity
Issued: 2017 October 03 06:55UTC
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 02.10.2017 at 20:00 UTC was 86 sfu.
The background X-Ray flux is at the class B1 level.
The geomagnetic field was at very quiet to active levels on October 2.
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: 410 km/s.
Solar Wind speed from STEREO A: 570 km/s.
Solar Wind speed from STEREO B: --- km/s.
The southward component Bz is: 2 nT south.

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

4. Coronal Holes
A new coronal hole (CH827) which extends to the southern hemisphere of the visible solar disk will be in Earth facing position on October 1-3. A high speed stream of solar wind is expected to reach Earth on the second half of October 3.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels on October 3 and at quiet to unsettled levels with a chance for active levels on October 4-5 due to CH827 effects.

   Date      Estimated Ap index      Expected geom. storm
2017.10.03           08                        -
2017.10.04           07                        -
2017.10.05           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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