*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 February 28 06:51UTC 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 27.02.2019 at 20:00 UTC was 71 sfu. The background X-Ray flux is at the class < A1 level. The geomagnetic field was at very quiet to active levels on February 27. 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: 520 km/s. Solar Wind speed from STEREO A: 320 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 1 nT south. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes A new equatorial coronal hole (CH909) will be in Earth facing position on February 23-26. A high speed stream of solar wind finally reached Earth on the first half of February 27 triggering a minor (G1) geomagnetic storm. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at unsettled to minor storm levels on February 28 and at unsettled to active levels on March 1-2 due to CH909 effects. Date Estimated Ap index Expected geom. storm 2019.02.28 20 G1 2019.03.01 14 - 2019.03.02 10 - *************************************************************************** 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 ***************************************************************************