*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2018 August 07 06:49UTC 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 06.08.2018 at 20:00 UTC was 69 sfu. The background X-Ray flux is at the class A2 level. The geomagnetic field was at very quiet levels on August 6. 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: 330 km/s. Solar Wind speed from STEREO A: 295 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 5 nT north. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes A coronal hole (CH878) was in Earth facing position on August 2-3. A new equatorial coronal hole (CH879) will be in Earth facing position on August 7. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet to unsettled levels on August 7 due to CH878 effects and at very quiet levels on August 8-9. Date Estimated Ap index Expected geom. storm 2018.08.07 06 - 2018.08.08 04 - 2018.08.09 03 - *************************************************************************** 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 ***************************************************************************