*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2018 August 26 05:48UTC Prepared by the Athens Space Weather Forecasting Center *********************************************************************** 1. Solar activity Solar activity was increasing during the past 24 hours. Solar Flux (10.7 cm) measured on 25.08.2018 at 20:00 UTC was 72 sfu. The background X-Ray flux is at the class A3 level. The geomagnetic field was at very quiet to active levels on August 25. No obviously Earth directed CMEs were observed in available LASCO imagery. The Kp index now is at moderate storm (G2) levels with Kp=6. 2. Solar Wind Geomagnetic Activity Solar Wind speed from ACE: 380 km/s. Solar Wind speed from STEREO A: 320 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 15 nT south. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes No obvious coronal holes are currently in the visible solar disk. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet to moderate storm (G2) levels due to CME effects on August 26 and at quiet to unsettled levels on August 27-28. Date Estimated Ap index Expected geom. storm 2018.08.26 34 G2 2018.08.27 10 - 2018.08.28 08 - *************************************************************************** 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 ***************************************************************************