*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 May 15 04:58UTC 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 14.05.2019 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 to strong geomagnetic storm (G3) levels on May 14 due to the arrival of a CME. No obviously Earth directed CMEs were observed in available LASCO imagery of May 14. The Kp index now is at quiet levels with Kp=1. 2. Solar Wind Geomagnetic Activity Solar Wind speed from ACE: 450 km/s. Solar Wind speed from STEREO A: 290 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 6 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 unsettled levels on May 15 and 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. Date Estimated Ap index Expected geom. storm 2019.05.15 08 - 2019.05.16 34 G1 - G2 2019.05.17 20 G1 *************************************************************************** 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 ***************************************************************************