*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 September 07 07:03UTC 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 06.09.2019 at 20:00 UTC was 69 sfu. The background X-Ray flux is at the class A7 level. The geomagnetic field was at quiet to active levels on September 6. 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: 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: 3 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 almost quiet levels, with a chance for unsettled intervals, on September 7-8 due to CH936 effects and at quiet levels on September 9. Date Estimated Ap index Expected geom. storm 2019.09.07 04 - 2019.09.08 03 - 2019.09.09 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 ***************************************************************************