*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 July 04 05:38UTC 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 03.07.2019 at 20:00 UTC was 67 sfu. The background X-Ray flux is at the class ‘7 level. The geomagnetic field was at very quiet levels on July 3. No obviously Earth directed CMEs were observed in available LASCO imagery. The Kp index now is at very quiet levels with Kp=0. 2. Solar Wind Geomagnetic Activity Solar Wind speed from ACE: 350 km/s. Solar Wind speed from STEREO A: 320 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 0 nT. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes A new equatorial coronal hole (CH927) will be in Earth facing position on July 1-2. A high speed stream of solar wind from this CH is expected to reach Earth on the first half of July 5. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at very quiet levels on July 4 and at quiet to active levels on July 5-6 due to CH927 effects. Date Estimated Ap index Expected geom. storm 2019.07.04 02 - 2019.07.05 12 - 2019.07.06 10 - *************************************************************************** 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 ***************************************************************************