*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2020 April 09 06:14UTC 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 08.04.2020 at 20:00 UTC was 70 sfu. The background X-Ray flux is at the class A2 level. The geomagnetic field was at quiet to unsettled levels on April 8. 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: 410 km/s. Solar Wind speed from STEREO A: 400 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 (CH958) in the southern hemisphere of the visible solar disk will be in Earth facing position on April 7-8. An associated high speed stream of solar wind from this CH is expected to reach Earth on the second half of April 10. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet to unusettled levels on April 9 and at quiet to active levels on April 10-11 due to effects from CH958. Date Estimated Ap index Expected geom. storm 2020.04.09 05 - 2020.04.10 10 - 2020.04.11 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 ***************************************************************************