*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 November 20 04:43UTC 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 19.11.2019 at 20:00 UTC was 70 sfu. The background X-Ray flux is at the class A7 level. The geomagnetic field was at very quiet levels on November 19. No obviously Earth directed CMEs were observed in available LASCO imagery. The Kp index now is at quiet levels with Kp=1. 2. Solar Wind Geomagnetic Activity Solar Wind speed from ACE: 345 km/s. Solar Wind speed from STEREO A: 370 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 1 nT north. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes A new coronal hole (CH945) will be in Earth facing position on November 16-19. A high speed stream of solar wind from this CH is expected to reach Earth on the first half of November 20, but the major part is expected on the first half of November 21. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at very quiet levels on November 20 and at quiet to unsettled levels with a chance for active intervals on November 21-22 due to CH945 effects. Date Estimated Ap index Expected geom. storm 2019.11.20 01 - 2019.11.21 10 - 2019.11.22 12 - *************************************************************************** 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 ***************************************************************************