*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 May 23 06:24UTC 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 22.05.2019 at 20:00 UTC was 67 sfu. The background X-Ray flux is at the class A6 level. The geomagnetic field was at quiet levels on May 22. 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: 335 km/s. Solar Wind speed from STEREO A: 540 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 (CH919) on the southern hemisphere of the visible solar disk will be in Earth facing position on May 23-25. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet levels on May 23-24 and at quiet to unsettled levels on May 25. Date Estimated Ap index Expected geom. storm 2019.05.23 03 - 2019.05.24 02 - 2019.05.25 04 - *************************************************************************** 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 ***************************************************************************