*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2020 February 11 07:00UTC Prepared by the Athens Space Weather Forecasting Center *********************************************************************** 1. Solar activity Solar activity was decreasing stable during the past 24 hours. Solar Flux (10.7 cm) measured on 10.02.2020 at 20:00 UTC was 70 sfu. The background X-Ray flux is at the class < A1 level. The geomagnetic field was at almost quiet levels on February 10. 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: 435 km/s. Solar Wind speed from STEREO A: --- 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 A new small coronal hole (CH951) on the northern hemisphere of solar disk was in Earth facing position on Feb. 7-8. A high speed stream of solar wind is expected to reach Earth on the second half of February 10 or at the first hours of February 11. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at unsettled to active levels on February 11, at quiet to unsettled levels on February 12 due to CH951 effects and at quiet levels on February 13. Date Estimated Ap index Expected geom. storm 2020.02.11 12 - 2020.02.12 07 - 2020.02.13 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 ***************************************************************************