*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2020 July 31 05:56UTC 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 30.07.2020 at 20:00 UTC was 73 sfu. The background X-Ray flux is at the class A3.1 level. The geomagnetic field was at very quiet levels on July 30. 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: 320 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 coronal hole (CH969) on the northern hemisphere of the visible solar disk was in Earth facing position on July 29-31. Weak effects are expected not earlier than the second half of August 02. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at mostly quiet levels, with a chance for unsettled intervals, on July 31 - August 02. Date Estimated Ap index Expected geom. storm 2020.07.31 03 - 2020.08.01 03 - 2020.08.02 04 - *************************************************************************** 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 ***************************************************************************