*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2018 May 02 05:00UTC 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 01.05.2018 at 20:00 UTC was 68 sfu. The background X-Ray flux is at the class A3 level. The geomagnetic field was at very quiet levels on May 1. 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: 385 km/s. Solar Wind speed from STEREO A: 420 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 new equatorial coronal hole (CH863) will be in Earth facing position on May 2-4. A high speed stream of solar wind is expected to reach Earth on the second half of May 5. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at very quiet levels on May 2-4. Date Estimated Ap index Expected geom. storm 2018.05.02 01 - 2018.05.03 02 - 2018.05.04 02 - *************************************************************************** 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 ***************************************************************************