During the last week, solar activity was high on 10 Mar, moderate on 8 and 14 Mar, low for the rest of time. Twelve sunspot regions (AR3599-AR3600, AR3602-AR3611) were on the visible disk with three M-class flares and several C-class flares produced. No solar proton event occurred. The F10.7 index fluctuated between 127sfu and 135sfu. Due to the effect of the coronal hole high speed stream, the solar wind speed reached a peak of about 510km/s, and the geomagnetic field reached active levels for 6 hours on 8-9 Mar. The geomagnetic field was at quiet to unsettled on the rest of time. |