*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 May 22 06:20UTC Prepared by the Athens Space Weather Forecasting Center *********************************************************************** 1. Solar activity Solar activity was decreasing stable during the past 24 hours. Solar Flux (10.7 cm) measured on 21.05.2019 at 20:00 UTC was 68 sfu. The background X-Ray flux is at the class A7 level. The geomagnetic field was at quiet levels on May 21. 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: 390 km/s. Solar Wind speed from STEREO A: 600 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 An extension of the southern coronal hole (CH918) was in Earth facing position on May 17-18. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet levels, with a chance for unsettled intervals, on May 22 due to weak effects from CH918 and at quiet levels on May 23-24. Date Estimated Ap index Expected geom. storm 2019.05.22 04 - 2019.05.23 03 - 2019.05.24 02 - *************************************************************************** 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 ***************************************************************************