*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 January 24 05:57UTC 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 23.01.2019 at 20:00 UTC was 72 sfu. The background X-Ray flux is at the class A2 level. The geomagnetic field was at almost quiet to active levels on January 23. No obviously Earth directed CMEs were observed in available LASCO imagery. The Kp index now is at active levels with Kp=4. 2. Solar Wind Geomagnetic Activity Solar Wind speed from ACE: 545 km/s. Solar Wind speed from STEREO A: 380 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 2 nT south. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes A new equatorial coronal hole (CH904) was in Earth facing position on January 19-21. A high speed stream of solar wind finally reached Earth on January 23 as it was predicted. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at unsettled to minor storm levels on January 24-25 and at quiet to unsettled levels on January 26 due to CH904 effects. Date Estimated Ap index Expected geom. storm 2019.01.24 21 G1 2019.01.25 16 - 2019.01.26 10 - *************************************************************************** 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 ***************************************************************************