*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2018 October 12 05:51UTC 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 11.10.2018 at 20:00 UTC was 71 sfu. The background X-Ray flux is at the class A2 level. The geomagnetic field was at quiet to unsettled levels on October 11. 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: 460 km/s. Solar Wind speed from STEREO A: 380 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 1 nT north. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes A new coronal hole (CH889) will be in Earth facing position on October 10-12. A high speed stream of solar wind is expected to reach Earth on October 13-14. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet levels, with a chance for unsettled intervals, on October 12, at quiet levels on October 13 and at quiet to active levels on October 14 due to CH889 effects. Date Estimated Ap index Expected geom. storm 2018.10.12 06 - 2018.10.13 04 - 2018.10.14 12 - *************************************************************************** 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 ***************************************************************************