*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2018 January 14 12:33UTC 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 13.01.2018 at 20:00 UTC was 71 sfu. The background X-Ray flux is at the class ‘3 level. The geomagnetic field was at very quiet to unsettled levels on January 13. No obviously Earth directed CMEs were observed in available LASCO imagery. The Kp index now is at almost quiet levels with Kp=2. 2. Solar Wind Geomagnetic Activity Solar Wind speed from ACE: 580 km/s. Solar Wind speed from STEREO A: 440 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 coronal hole (CH847) was in Earth facing position on January 8-9. A high speed stream of solar wind from this CH finally reached Earth on the second half of January 13. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet to minor storm levels on January 14 due to effects from CH847 and at quiet levels on January 15-16. Date Estimated Ap index Expected geom. storm 2018.01.14 10 - 2018.01.15 04 - 2018.01.16 02 - *************************************************************************** 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 ***************************************************************************