*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2018 December 02 10:08UTC 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 01.12.2018 at 20:00 UTC was 68 sfu. The background X-Ray flux is at the class A3 level. The geomagnetic field was at quiet to unsettled levels on December 1. 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: 390 km/s. Solar Wind speed from STEREO A: 360 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 An equatorial coronal hole (CH897) was in Earth facing position on November 26-29. A high speed stream of solar wind reached Earth on the first hours of December 1 as it was predicted with minor geomagnetic impact. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet to active levels on December 2-3 and at quiet to unsettled levels on December 4 due to CH897 effects. Date Estimated Ap index Expected geom. storm 2018.12.02 12 - 2018.12.03 08 - 2018.12.04 06 - *************************************************************************** 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 ***************************************************************************