Here is this week’s space weather and geophysical report,...

Here is this week’s space weather and geophysical report, issued 2017 Jul 03 0114 UTC.

Highlights of Solar and Geomagnetic Activity 26 June - 02 July 2017

Solar activity was very low throughout the period. Region 2664 (N18, L=313, class/area=Dsi/100 on 27 Jun) was the most active region this week but only produced low-level B-class flare activity. A very faint CME, not associated with a flare event, was detected in coronagraph imagery midday on 27 Jun and is believed to have arrived at Earth late on 30 Jun/early on 01 Jul, causing a solar wind disturbance. Another, larger, partial halo CME associated with a long-duration B1 flare from Region 2664 was detected in coronagraph imagery midday on 28 Jun. This event is expected to arrive at Earth on 03 Jul.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit reached moderate levels on 26-30 Jun with normal levels observed on 01-02 Jul.

Geomagnetic field activity reached active and G1 (Minor) geomagnetic storm levels on 02 Jul due to the influence of a transient solar wind feature believed to be the passage of the 27 Jun CME. Quiet and quiet to unsettled conditions were observed throughout the remainder of the period under a nominal solar wind regime.

Forecast of Solar and Geomagnetic Activity 03 July - 29 July 2017

Solar activity is expected to be at low levels throughout the outlook period with a slight chance for isolated C-class flare activity.

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 16-19 Jul with moderate and normal levels expected throughout the remainder of the period.

Geomagnetic field activity is likely to reach G1 (Minor) geomagnetic storm levels on 03 Jul due to the anticipated arrival of the 28 Jun CME. G1 storm conditions are likely on 13 Jul with active levels likely on 14 Jul due to the influence of a recurrent negative polarity CH HSS. Generally quiet and quiet to unsettled conditions are expected throughout the remainder of the outlook period as a nominal solar wind regime prevails.

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