*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2020 April 30 07:42UTC 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 29.04.2020 at 20:00 UTC was 70 sfu. The background X-Ray flux is at the class A2 level. The geomagnetic field was at very quiet levels on April 29. An eruptive filament started on the 27-04-2020 at 09:15 produced a CME which seems to be geoeffective. The Time of Arrival (ToA) for this CME on Earth calculated with EAMv2 model: 01-05-2020 16:35. The Kp index now is at very quiet levels with Kp=0. 2. Solar Wind Geomagnetic Activity Solar Wind speed from ACE: 285 km/s. Solar Wind speed from STEREO A: 400 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 No obvious coronal holes are currently in the visible solar disk. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at very quiet levels on April 30. If the CME associated with a filament eruption on 27-04-2020 finally reach Earth, a minor storm will be noticed on the second half of May 1st and May 2. Date Estimated Ap index Expected geom. storm 2020.04.30 02 - 2020.05.01 08 G1 2020.05.02 17 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 ***************************************************************************