*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2019 October 01 05:01UTC 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 30.09.2019 at 20:00 UTC was 68 sfu. The background X-Ray flux is at the class A7 level. The geomagnetic field was at quiet to active levels on September 30. No obviously Earth directed CMEs were observed in available LASCO imagery. The Kp index now is at active levels with Kp=4. 2. Solar Wind Geomagnetic Activity Solar Wind speed from ACE: 470 km/s. Solar Wind speed from STEREO A: 350 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 6 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 quiet to active levels on October 1, at quiet to unsettled levels on October 2 and at almost quiet to unsettled levels, with a chance for active intervals, on October 3 due to CH939 effects. Date Estimated Ap index Expected geom. storm 2019.10.01 12 - 2019.10.02 06 - 2019.10.03 10 - *************************************************************************** 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 ***************************************************************************