*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 January 17 08:03UTC 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 16.01.2019 at 20:00 UTC was 70 sfu. The background X-Ray flux is at the class <A1 level. The geomagnetic field was at very quiet to unsettled levels on January 16. 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: 415 km/s. Solar Wind speed from STEREO A: 560 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 6 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. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet levels with a chance for unsettled intervals on January 17-19 due to weak effects from CH903. Date Estimated Ap index Expected geom. storm 2019.01.17 04 - 2019.01.18 02 - 2019.01.19 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 ***************************************************************************