*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2018 April 08 07:21UTC 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 07.04.2018 at 20:00 UTC was 67 sfu. The background X-Ray flux is at the class A2 level. The geomagnetic field was at very quiet levels on April 07. 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: 360 km/s. Solar Wind speed from STEREO A: 370 km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 1 nT north. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes A new equtorial coronal hole (CH860) will be in Earth facing position on April 06-09. A high speed stream of solar wind is expected to reach Earth on the second half of April 09. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet levels on April 08, at quiet to active levels on April 09 and at quiet to minor storm levels on April 10 due to CH860 effects. Date Estimated Ap index Expected geom. storm 2018.04.08 04 - 2018.04.09 08 - 2018.04.10 15 G1 *************************************************************************** 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 ***************************************************************************