*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2018 July 12 07:03UTC 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 11.07.2018 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 to unsettled levels on July 11. No obviously Earth directed CMEs were observed in available LASCO imagery. The Kp index now is at unsettled levels with Kp=3. 2. Solar Wind Geomagnetic Activity Solar Wind speed from ACE: 410 km/s. Solar Wind speed from STEREO A: 455 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 4 nT south. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes A new small coronal hole (CH874) at the southern hemisphere of the solar disk close to the equator will be in Earth facing position on July 12-13. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet to unsettled levels on July 12 and at almost quiet levels on July 13-14. Date Estimated Ap index Expected geom. storm 2018.07.12 06 - 2018.07.13 06 - 2018.07.14 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 ***************************************************************************