=================================== Weekly Space Weather Highlights =================================== Highlights of Solar and Geomagnetic Activity 04 - 10 December 2017 Solar activity was at very low levels. Regions 2690 (N07, L=332, class/area Bxo/010 on 06 Dec) and 2691 (S03, L=221, class/area Axx/010 on 10 dec) were both relatively quiet and stable throughout the period. No Earth-directed CMEs were observed. No proton events were observed at geosynchronous orbit. The greater than 2 MeV electron flux at geosynchronous orbit was at moderate levels on 04-05 Dec and increased to high levels on 06-10 Dec following CH HSS influence. Geomagnetic field activity was at quiet to active levels on 04-06 Dec with G1 (Minor) storm conditions observed on 05 Dec due to influence from a positive polarity CH HSS. Quiet to unsettled conditions were observed on 07 Dec as CH HSS effects waned. Quiet conditions prevailed for the remainder of the period. Forecast of Solar and Geomagnetic Activity 11 December - 06 January 2018 Solar activity is expected to be at very low levels throughout the period. No proton events are expected at geosynchronous orbit. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach high levels on 11 Dec, 13-17 Dec, 19-21 Dec and 02-06 Jan following recurrent CH HSS events. Normal to moderate levels are expected at all other times during the period. Geomagnetic field activity is expected to be at quiet to active levels on 11-13 Dec, decreasing to quiet to unsettled levels on 14 Dec due to positive polarity CH HSS effects. Quiet conditions are expected on 15-16 Dec. Unsettled to active conditions are expected on 17-21 Dec, with G1 (Minor) storm levels on 18 Dec due to recurrent positive polarity CH HSS influence. Quiet conditions are anticipated from 22-26 Dec, followed by unsettled to active levels on 27-28 Dec due to negative polarity CH HSS effects. A return to quiet conditions is expected on 29-30 Dec. Predominately unsettled to active conditions are expected on 31 Dec-03 Jan, with G1 (Minor) levels likely on 01 Jan, due to effects from a recurrent positive polarity CH HSS. Quiet conditions are expected for the remainder of the period.