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Product: Daily Forecast of Geomagnetic Activity
Issued: 2018 August 10 07:46UTC
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 09.08.2018 at 20:00 UTC was 70 sfu.
The background X-Ray flux is at the class A2 level.
The geomagnetic field was at very quiet levels on August 9.
No obviously Earth directed CMEs were observed in available LASCO imagery.
The Kp index now is at quiet levels with Kp=1.

2. Solar Wind Geomagnetic Activity
Solar Wind speed from ACE: 380 km/s.
Solar Wind speed from STEREO A: 400 km/s.
Solar Wind speed from STEREO B: --- km/s.
The southward component Bz is: 4 nT north.

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

4. Coronal Holes
An equatorial coronal hole (CH879) was in Earth facing position on August 7-9. A new coronal hole (CH880) which is an extension of the northern polar coronal hole will be in Earth facing position on August 11.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at very quiet levels on August 10 with a chance for active intervals and at quiet to active levels on August 11-12.

   Date      Estimated Ap index      Expected geom. storm
2018.08.10           04                        -
2018.08.11           10                        -
2018.08.12           11                        -

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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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