*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 January 18 07:36UTC 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 17.01.2019 at 20:00 UTC was 69 sfu. The background X-Ray flux is at the class A1 level. The geomagnetic field was at quiet to unsettled levels on January 17. 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: 460 km/s. Solar Wind speed from STEREO A: 450 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 2 nT north. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes A poorly defined coronal hole (CH903) on the southern hemisphere of the visible solar disk was in Earth facing position on January 13-15. A new equatorial coronal hole (CH904) will be in Earth facing position on January 18-20. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet levels with a chance for unsettled intervals on January 18 due to weak effects from CH903 and at very quiet levels on January 19-20. Date Estimated Ap index Expected geom. storm 2019.01.18 03 - 2019.01.19 02 - 2019.01.20 01 - *************************************************************************** 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 ***************************************************************************