*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 April 07 05:37UTC 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 06.04.2019 at 20:00 UTC was 74 sfu. The background X-Ray flux is at the class A4 level. The geomagnetic field was at quiet to unsettled levels on April 6. No obviously Earth directed CMEs were observed in available LASCO imagery. The Kp index now is at quiet levels with Kp=1. 2. Solar Wind Geomagnetic Activity Solar Wind speed from ACE: 430 km/s. Solar Wind speed from STEREO A: 310 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 2 nT south. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes An extension (CH914) of the southern polar coronal hole will be in Earth facing position on March 30 - April 2. A high speed stream of solar wind from this CH reached Earth on April 4 at 14:00UT. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at almost quiet levels on April 7 and at very quiet levels on April 8-9. Date Estimated Ap index Expected geom. storm 2019.04.07 04 - 2019.04.08 03 - 2019.04.09 02 - *************************************************************************** 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 ***************************************************************************