*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 September 09 04:10UTC 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 08.09.2019 at 20:00 UTC was 69 sfu. The background X-Ray flux is at the class A6 level. The geomagnetic field was at quiet to unsettled levels on September 8. No obviously Earth directed CMEs were observed in available LASCO imagery. The Kp index now is at unsettled levels with Kp=3. 2. Solar Wind Geomagnetic Activity Solar Wind speed from ACE: 460 km/s. Solar Wind speed from STEREO A: 300 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 2 nT north. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes A new coronal hole (CH936) on the southern hemisphere of the visible solar disk was in Earth facing position on September 3-4. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet to unsettled levels on September 9-10 due to CH936 weak effects and at quiet levels on September 11. Date Estimated Ap index Expected geom. storm 2019.09.09 13 - 2019.09.10 09 - 2019.09.11 05 - *************************************************************************** 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 ***************************************************************************