*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 May 13 05:32UTC 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 12.05.2019 at 20:00 UTC was 76 sfu. The background X-Ray flux is at the class B1 level. The geomagnetic field was at quiet levels on May 12. A faint partial HALO CME noticed on May 12 at around 20:00 UT. This CME looks geoeffective and the arrival time estimated on May 16 at 21:10 UT. The Kp index now is at quiet levels with Kp=1. 2. Solar Wind Geomagnetic Activity Solar Wind speed from ACE: 315 km/s. Solar Wind speed from STEREO A: 360 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 No obvious coronal holes are currently in the visible solar disk. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at very quiet levels on May 13-14 and at quiet to unsettled levels on May 15. Date Estimated Ap index Expected geom. storm 2019.05.13 03 - 2019.05.14 02 - 2019.05.15 08 - *************************************************************************** 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 ***************************************************************************