*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2018 July 10 05:17UTC 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 09.07.2018 at 20:00 UTC was 73 sfu. The background X-Ray flux is at the class A3 level. The geomagnetic field was at very quiet levels on July 9. 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: 370 km/s. Solar Wind speed from STEREO A: 270 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 small equatorial coronal hole (CH873) was in Earth facing position on July 5-6. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet to unsettled levels on July 10-11 due to CH873 and at quiet levels on July 12. Date Estimated Ap index Expected geom. storm 2018.07.10 07 - 2018.07.11 05 - 2018.07.12 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 ***************************************************************************