*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2018 March 07 05:39UTC Prepared by the Athens Space Weather Forecasting Center *********************************************************************** 1. Solar activity Solar activity was almost stable during the past 24 hours. Solar Flux (10.7 cm) measured on 06.03.2018 at 20:00 UTC was 68 sfu. The background X-Ray flux is at the class A1 level. The geomagnetic field was at very quiet levels on March 6. 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: 400 km/s. Solar Wind speed from STEREO A: 550 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 An extension of the northern polar coronal hole (CH855) was in Earth facing position on March 4 - March 6. A new small southern coronal hole (CH856) was in Earth facing position also on March 4 - 5. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet to unsettled levels on March 7-9 due to CH855 and CH856 effects. Date Estimated Ap index Expected geom. storm 2018.03.07 06 - 2018.03.08 07 - 2018.03.09 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 ***************************************************************************