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Product: Daily Forecast of Geomagnetic Activity
Issued: 2018 March 17 05:11UTC
Prepared by the Athens Space Weather Forecasting Center
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1. Solar activity
Solar activity was increasing during the past 24 hours.
Solar Flux (10.7 cm) measured on 16.03.2018 at 20:00 UTC was 69 sfu.
The background X-Ray flux is at the class A2 level.
The geomagnetic field was at unsettled to active levels on March 16.
No obviously Earth directed CMEs were observed in available LASCO imagery.
The Kp index now is at active levels with Kp=4.

2. Solar Wind Geomagnetic Activity
Solar Wind speed from ACE: 495 km/s.
Solar Wind speed from STEREO A: 470 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
An equatorial coronal hole (CH857) was in Earth facing position on March 10-15.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to active levels on March 17-18 due to CH857 effects and at quiet to unsettled levels on March 19.

   Date      Estimated Ap index      Expected geom. storm
2018.03.17           13                        -
2018.03.18           11                        -
2018.03.19           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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