*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2018 February 19 09:49UTC Prepared by the Athens Space Weather Forecasting Center *********************************************************************** 1. Solar activity Solar activity was increasing during the past 24 hours. Solar Flux (10.7 cm) measured on 18.02.2018 at 20:00 UTC was 70 sfu. The background X-Ray flux is at the class A2 level. The geomagnetic field was at almost quiet to active levels on February 18. No obviously Earth directed CMEs were observed in available LASCO imagery. The Kp index now is at almost quiet levels with Kp=2. 2. Solar Wind Geomagnetic Activity Solar Wind speed from ACE: 600 km/s. Solar Wind speed from STEREO A: 330 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 1 nT south. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes The coronal hole CH851 was in Earth facing position on February 12-17. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at almost quiet to active levels, with a chance for minor storm intervals, on February 19-20 due to the CH851 effects and at quiet to unsettled levels on February 21. Date Estimated Ap index Expected geom. storm 2018.02.19 14 G1 2018.02.20 12 - 2018.02.21 08 - *************************************************************************** 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 ***************************************************************************