*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 July 05 04:56UTC 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 04.07.2019 at 20:00 UTC was 68 sfu. The background X-Ray flux is at the class A7 level. The geomagnetic field was at quiet levels on July 4. 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: 420 km/s. Solar Wind speed from STEREO A: 300 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 An equatorial coronal hole (CH927) was 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. A new coronal hole (CH928) on the northern hemisphere of the visible solar disk will be in Earth facing position on July 4-5. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet to active levels on July 5 and at quiet to unsettled levels on July 6 due to CH927 effects. Quiet conditions are expected on July 7. Date Estimated Ap index Expected geom. storm 2019.07.05 10 - 2019.07.06 07 - 2019.07.07 04 - *************************************************************************** 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 ***************************************************************************