*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2018 October 29 05:43UTC 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 28.10.2018 at 20:00 UTC was 68 sfu. The background X-Ray flux is at the class A2 level. The geomagnetic field was at very quiet levels on October 28. 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: 320 km/s. Solar Wind speed from STEREO A: 580 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 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. A high speed stream of solar wind is expected to reach Earth from CH891 at the second half of October 30. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at very quiet levels on October 29 and at quiet to unsettled levels on October 30-31 due to CH891 effects. Date Estimated Ap index Expected geom. storm 2018.10.29 01 - 2018.10.30 05 - 2018.10.31 08 - *************************************************************************** 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 ***************************************************************************