*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 May 16 05:29UTC 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 15.05.2019 at 20:00 UTC was 74 sfu. The background X-Ray flux is at the class A9 level. The geomagnetic field was at almost quiet levels on May 15. No obviously Earth directed CMEs were observed in available LASCO imagery of May 15. The Kp index now is at almost quiet levels with Kp=2. 2. Solar Wind Geomagnetic Activity Solar Wind speed from ACE: 450 km/s. Solar Wind speed from STEREO A: 330 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 No obvious coronal holes are currently in the visible solar disk. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet to minor storm levels, with a chance for moderate storm intervals, on May 16-17 due to multiple CMEs which are expected to arrive at Earth. Quiet to unsettled conditions are epected on May 18. Date Estimated Ap index Expected geom. storm 2019.05.16 18 G1 2019.05.17 32 G1 - G2 2019.05.18 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 ***************************************************************************