*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 August 04 04:10UTC Prepared by the Athens Space Weather Forecasting Center *********************************************************************** 1. Solar activity Solar activity was decreasing during the past 24 hours. Solar Flux (10.7 cm) measured on 03.08.2019 at 20:00 UTC was 69 sfu. The background X-Ray flux is at the class < A1 level. The geomagnetic field was at very quiet levels on August 03. 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: 320 km/s. Solar Wind speed from STEREO A: 380 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 1 nT north. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes A new equatorial coronal hole (CH932) was in Earth facing position on August 1-2. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at very quiet levels on August 4 and at quiet to active levels on August 5-6, with a chance for minor storm levels due to CH932 effects. Date Estimated Ap index Expected geom. storm 2019.08.04 03 - 2019.08.05 30 - 2019.08.06 15 - *************************************************************************** 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 ***************************************************************************