*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2018 October 17 05:09UTC Prepared by the Athens Space Weather Forecasting Center *********************************************************************** 1. Solar activity Solar activity was decreasing stable during the past 24 hours. Solar Flux (10.7 cm) measured on 16.10.2018 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 levels on October 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: 455 km/s. Solar Wind speed from STEREO A: 400 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 4 nT north. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes A coronal hole (CH889) was in Earth facing position on October 10-12. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at very quiet levels on October 17-19. Date Estimated Ap index Expected geom. storm 2018.10.17 03 - 2018.10.18 03 - 2018.10.19 04 - *************************************************************************** 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 ***************************************************************************