*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2018 August 29 05:33UTC 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 28.08.2018 at 20:00 UTC was 70 sfu. The background X-Ray flux is at the class A3 level. The geomagnetic field was at very quiet to active levels on August 28. No obviously Earth directed CMEs were observed in available LASCO imagery. The Kp index now is at almost quiet levels with Kp=2. 2. Solar Wind Geomagnetic Activity Solar Wind speed from ACE: 555 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 south. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes A new, poorly defined, coronal hole (CH822) was in Earth facing position on August 27-28. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at mostly quiet levels with a chance for unsettled intervals on August 29-31. Date Estimated Ap index Expected geom. storm 2018.08.29 04 - 2018.08.30 06 - 2018.08.31 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 ***************************************************************************