*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 March 26 06:45UTC 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 25.03.2019 at 20:00 UTC was 71 sfu. The background X-Ray flux is at the class A4 level. The geomagnetic field was at quiet levels on March 25. 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: 325 km/s. Solar Wind speed from STEREO A: 340 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 An extension of the southern polar coronal hole was in Earth facing position on March 24-25. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet to unsettled levels on March 26-28 with a chance for active intervals due to weak effects from the arrival of 20 March CME as well as the coronal hole effects. Date Estimated Ap index Expected geom. storm 2019.03.26 05 - 2019.03.27 06 - 2019.03.28 12 - *************************************************************************** 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 ***************************************************************************