*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 October 03 05:12UTC 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 02.10.2019 at 20:00 UTC was 68 sfu. The background X-Ray flux is at the class A7 level. The geomagnetic field was at very quiet to unsettled levels on October 2. 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: 460 km/s. Solar Wind speed from STEREO A: 440 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 poorly defined southern hemisphere coronal hole (CH939) was in Earth facing position on September 30-October 1. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at almost quiet to unsettled levels, with a chance for active intervals, on October 3, at quiet to unsettled levels on October 4 due to CH939 effects and at quiet levels on October 5. Date Estimated Ap index Expected geom. storm 2019.10.03 07 - 2019.10.04 06 - 2019.10.05 04 - *************************************************************************** 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 ***************************************************************************