*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2018 August 30 06:22UTC Prepared by the Athens Space Weather Forecasting Center *********************************************************************** 1. Solar activity Solar activity was almost stable during the past 24 hours. Solar Flux (10.7 cm) measured on 29.08.2018 at 20:00 UTC was 71 sfu. The background X-Ray flux is at the class A3 level. The geomagnetic field was at very quiet to active levels on August 29. 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: 475 km/s. Solar Wind speed from STEREO A: 510 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 30 - September 1. Date Estimated Ap index Expected geom. storm 2018.08.30 04 - 2018.08.31 05 - 2018.09.01 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 ***************************************************************************