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Product: Daily Forecast of Geomagnetic Activity
Issued: 2017 July 15 07:52UTC
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 14.07.2017 at 20:00 UTC was 92 sfu.
The background X-Ray flux is at the class C1 level.
The geomagnetic field was at very quiet levels on July 14.
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: 340 km/s.
Solar Wind speed from STEREO A: 370 km/s.
Solar Wind speed from STEREO B: --- km/s.
The southward component Bz is: 1 nT south.

3. Solar Energetic Particle Events
A minor solar storm (S1) observed on July 14 as 10 MeV Integral Flux was above 10 pfu.

4. Coronal Holes
A new coronal hole (CH815) on the northern hemisphere of the visible solar disk will be in Earth facing position on July 16-17.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet levels on July 15 and at unsettled to moderate storm levels on July 16-17 due to the arrival of the CME.

   Date      Estimated Ap index      Expected geom. storm
2017.07.15           05                        -
2017.07.16           24                        G1 - G2
2017.07.17           46                        G2 - G3

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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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