*********************************************************************** Product: Daily Forecast of Geomagnetic Activity Issued: 2018 February 13 06:15UTC 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 12.02.2018 at 20:00 UTC was 79 sfu. The background X-Ray flux is at the class A9 level. The geomagnetic field was at very quiet levels on February 12. A C1.5 solar flare noticed on 01:35UT (peak time) from AR2699. Tis event associated with a partial halo CME noticed on 01:25 UT. This CME according to our model EAMv2 is expected to reach Earth on February 15 at 06:24UT. No obviously Earth directed CMEs were observed in available LASCO imagery. The Kp index now is at very quiet levels with Kp=0. 2. Solar Wind Geomagnetic Activity Solar Wind speed from ACE: 310 km/s. Solar Wind speed from STEREO A: --- km/s. Solar Wind speed from STEREO B: --- km/s. The southward component Bz is: 0 nT. 3. Solar Energetic Particle Events Protons and electrons are quiet. 4. Coronal Holes A new coronal hole (CH851) will be in Earth facing position on February 12-13. A small equatorial coronal hole (CH852) was in Earth facing position on February 9-10. 5. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet levels, with a chance for unsettled levels, on February 13-14 and at quiet to minor storm levels on February 15 due to the arrival of the CME of February 12. Date Estimated Ap index Expected geom. storm 2018.02.13 03 - 2018.02.14 04 - 2018.02.15 22 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 ***************************************************************************