*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 August 22 04:34UTC 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 21.08.2019 at 20:00 UTC was 67 sfu. The background X-Ray flux is at the class A6 level. The geomagnetic field was at very quiet levels on August 21. 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: 355 km/s. Solar Wind speed from STEREO A: 530 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 1 nT south. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes A new coronal hole (CH934) on the southern hemisphere of the visible solar disk is expected to be in Earth facing position on August 23-24. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at almost quiet levels on August 21-23. Date Estimated Ap index Expected geom. storm 2019.08.22 04 - 2019.08.23 03 - 2019.08.24 03 - *************************************************************************** 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 ***************************************************************************