*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 March 25 12:22UTC 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 24.03.2019 at 20:00 UTC was 75 sfu. The background X-Ray flux is at the class B1 level. The geomagnetic field was at very quiet levels on March 24. The March 20 CME finally arrived on March 24 at 20:40 UT without any geomagnetic effect. 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: 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: 3 nT north. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes An extension of the southern polar coronal hole will be in Earth facing position on March 24-25. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at very quiet levels on March 25-27 with a chance for unsettled intervals due to minor effects from the arrival of 20 March CME. Date Estimated Ap index Expected geom. storm 2019.03.25 03 - 2019.03.26 02 - 2019.03.27 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 ***************************************************************************