*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 May 06 05:36UTC 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 05.05.2019 at 20:00 UTC was 74 sfu. The background X-Ray flux is at the class B1 level. The geomagnetic field was at very quiet levels on May 5. 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: 375 km/s. Solar Wind speed from STEREO A: 290 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 3 nT north. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes A new small equatorial coronal hole (CH917) was in Earth facing position on May 3-4. A high speed stream of solar wind is expected to reach Earth on the first half of May 7. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at very quiet levels on May 6 and at quiet to active levels on May 7-8 due to CH917 effects. Date Estimated Ap index Expected geom. storm 2019.05.06 03 - 2019.05.07 07 - 2019.05.08 10 - *************************************************************************** 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 ***************************************************************************