*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 April 01 07:05UTC 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 31.03.2019 at 20:00 UTC was 70 sfu. The background X-Ray flux is at the class < A1 level. The geomagnetic field was at quiet to active levels on March 31. 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: 415 km/s. Solar Wind speed from STEREO A: 320 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 3 nT south. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes A new small coronal hole (CH913) in the northern hemisphere of the visible solar disk was in Earth facing position on March 28. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet levels, with a chance for unsettled intervals, on April 1-2 due to CH913 effects and at very quiet levels on April 3. Date Estimated Ap index Expected geom. storm 2019.04.01 04 - 2019.04.02 03 - 2019.04.03 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 ***************************************************************************