*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2018 October 31 06:44UTC 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 30.10.2018 at 20:00 UTC was 67 sfu. The background X-Ray flux is at the class A1 level. The geomagnetic field was at very quiet levels on October 30. 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: 300 km/s. Solar Wind speed from STEREO A: --- km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 3 nT north. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes A small equatorial coronal hole (CH891) was in Earth facing position on October 27-28. A new equatorial coronal hole (CH892) will be in Earth facing position on October 30-31. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet to unsettled levels, with a chance for active intervals, on October 31 due to CH891 effects and at very quiet levels on November 1-2. Date Estimated Ap index Expected geom. storm 2018.10.31 05 - 2018.11.01 03 - 2018.11.02 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 ***************************************************************************