*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 May 12 08:00UTC 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 11.05.2019 at 20:00 UTC was 78 sfu. The background X-Ray flux is at the class B1 level. The geomagnetic field was at almost quiet to minor storm levels on May 11. A CME noticed on May 11 at around 00:00 UT. This CME looks geoeffective and the arrival time estimated on May 14 at 23:50 UT. The Kp index now is at quiet levels with Kp=1. 2. Solar Wind Geomagnetic Activity Solar Wind speed from ACE: 340 km/s. Solar Wind speed from STEREO A: 425 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 4 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 quiet to unsettled levels on May 12 and at quiet levels on May 13-14. Date Estimated Ap index Expected geom. storm 2019.05.12 04 - 2019.05.13 03 - 2019.05.14 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 ***************************************************************************