*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 February 25 08:00UTC Prepared by the Athens Space Weather Forecasting Center *********************************************************************** 1. Solar activity Solar activity was almost stable during the past 24 hours. Solar Flux (10.7 cm) measured on 24.02.2019 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 levels on February 24. No obviously Earth directed CMEs were observed in available LASCO imagery. The Kp index now is at very quiet levels with Kp=0. 2. Solar Wind Geomagnetic Activity Solar Wind speed from ACE: 315 km/s. Solar Wind speed from STEREO A: 360 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 4 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 is expected to reach Earth on the second half of February 26. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at very quiet levels on February 25, at quiet to unsettled levels, with a chance for active intervals, on February 26 and at unsettled to minor storm levels on February 27 due to CH909. Date Estimated Ap index Expected geom. storm 2019.02.25 01 - 2019.02.26 05 - 2019.02.27 16 G1 *************************************************************************** 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 ***************************************************************************