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Product: Daily Forecast of Geomagnetic Activity
Issued: 2017 October 31 07:22UTC
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 30.10.2017 at 20:00 UTC was 76 sfu.
The background X-Ray flux is at the class A5 level.
The geomagnetic field was at very quiet levels on October 30.
No obviously Earth directed CMEs were observed in available LASCO imagery.
The Kp index now is at very quiet levels with Kp=0.

2. Solar Wind Geomagnetic Activity
Solar Wind speed from ACE: 280 km/s.
Solar Wind speed from STEREO A: 620 km/s.
Solar Wind speed from STEREO B: --- km/s.
The southward component Bz is: 0 nT.

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

4. Coronal Holes
A new coronal hole (CH832) was in Earth facing position on October 29-30. A high speed stream of solar wind is expected to reach Earth at the second half of October 31.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at mostly quiet levels on October 31, at quiet ot unsettled levels on November 1 and at quiet to active levels on November 2.

   Date      Estimated Ap index      Expected geom. storm
2017.10.31           03                        -
2017.11.01           08                        -
2017.11.02           14                        -

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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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