*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2018 October 15 06:39UTC 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 14.10.2018 at 20:00 UTC was 72 sfu. The background X-Ray flux is at the class A2 level. The geomagnetic field was at almost quiet levels on October 14. 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: 545 km/s. Solar Wind speed from STEREO A: 450 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 2 nT north. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes A coronal hole (CH889) was in Earth facing position on October 10-12. A high speed stream of solar wind reached Earth on the second half of October 13 producing minor storm geomagnetic conditions. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet to unsettled levels on October 15 and at quiet levels on October 16-17. Date Estimated Ap index Expected geom. storm 2018.10.15 06 - 2018.10.16 04 - 2018.10.17 03 - *************************************************************************** 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 ***************************************************************************