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Product: Daily Forecast of Geomagnetic Activity
Issued: 2018 September 08 07:04UTC
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 07.09.2018 at 20:00 UTC was 68 sfu.
The background X-Ray flux is at the class A2 level.
The geomagnetic field was at very quiet levels on September 7.
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: 560 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 equatorial coronal hole (CH884) will be in Earth facing position on September 7-8. A high speed stream of solar wind is expected to reach Earth on the first half of September 10.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet levels, with a chance for unsettled intervals, on September 8 and at very quiet levels on September 9. Quiet to unsettled conditions, with a chance for active intervals are expected on September 10 due to CH884 effects.

   Date      Estimated Ap index      Expected geom. storm
2018.09.08           03                        -
2018.09.09           02                        -
2018.09.10           08                        -

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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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