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Product: Daily Forecast of Geomagnetic Activity
Issued: 2018 April 24 04:49UTC
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 23.04.2018 at 20:00 UTC was 74 sfu.
The background X-Ray flux is at the class A5 level.
The geomagnetic field was at quiet to unsettled levels on April 23.
No obviously Earth directed CMEs were observed in available LASCO imagery.
The Kp index now is quiet levels with Kp=1.

2. Solar Wind Geomagnetic Activity
Solar Wind speed from ACE: 400 km/s.
Solar Wind speed from STEREO A: 460 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 (CH862) will be in Earth facing position on April 22-24.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at very quiet levels on April 24-25 and at quiet to unsettled levels on April 26.

Date Estimated Ap index Expected geom. storm
2018.04.24 02 -
2018.04.25 02 -
2018.04.26 05 -

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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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