*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2018 November 17 09:17UTC Prepared by the Athens Space Weather Forecasting Center *********************************************************************** 1. Solar activity Solar activity was almost stable during the past 24 hours. Solar Flux (10.7 cm) measured on 16.11.2018 at 20:00 UTC was 71 sfu. The background X-Ray flux is at the class A5 level. The geomagnetic field was at very quiet levels on November 16. No obviously Earth directed CMEs were observed in available LASCO imagery. The Kp index now is at very quiet levels with Kp=0. 2. Solar Wind Geomagnetic Activity Solar Wind speed from ACE: 360 km/s. Solar Wind speed from STEREO A: 300 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 extension of the north polar coronal hole (CH874) of the visible solar disk was in Earth facing position on November 14-15. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at very quiet levels on November 17 and at quiet to unsettled levels on November 18-19 due to CH874 effects. Date Estimated Ap index Expected geom. storm 2018.11.17 02 - 2018.11.18 05 - 2018.11.19 06 - *************************************************************************** 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 ***************************************************************************