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Product: Daily Forecast of Geomagnetic Activity
Issued: 2018 February 27 05:12UTC
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 26.02.2018 at 20:00 UTC was 70 sfu.
The background X-Ray flux is at the class A1 level.
The geomagnetic field was at quiet to unsettled levels on February 26.
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: 465 km/s.
Solar Wind speed from STEREO A: 650 km/s.
Solar Wind speed from STEREO B: --- km/s.
The southward component Bz is: 5 nT north.

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

4. Coronal Holes
A coronal hole (CH854) which is an extension of the southern polar coronal hole was in Earth facing position on February 22-24.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to minor storm levels, with a chance for moderate storm levels, on February 27 due to CH854 effects and at quiet to unsettled levels on February 28-March 1.

   Date      Estimated Ap index      Expected geom. storm
2018.02.27           18                        G1
2018.02.28           12                        -
2018.03.01           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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