[Propagation+Space Weather] Weekly Propagation Summary - 2020 Sep 07 16:10 UTC

[nw7us@sunspotwatch.com]

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Here is this week's space weather and geophysical report, issued 2020 Sep 07 0121 UTC.

Highlights of Solar and Geomagnetic Activity 31 August - 06 September 2020

Solar activity was very low for the highlight period. No spotted regions were present on the visible disk. There were no Earth-directed CMEs observed during the period.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at moderate to high levels through the highlight period. A peak flux of 29,370 pfu was observed at 02/1625 UTC.

Geomagnetic field activity was at unsettled to G1 (minor) storm levels on 31 Aug, unsettled to active levels on 01 Sep and quiet to unsettled levels on 02 Sep; all due to positive polarity CH HSS influences. During this period of activity, solar wind speeds reached a peak of 619 km/s midday on 01 Sep, total field reached a maximum of 8 nT midday on 31 Aug and the Bz component reached a maximum southward extent of -7 nT midday on 31 Aug. Phi angle was in a mostly positive solar sector.

Quiet to isolated unsettled levels were observed from 03-06 Sep as CH HSS effects slowly waned. Solar wind parameters gradually returned to nominal levels by the end of the highlight period.

Forecast of Solar and Geomagnetic Activity 07 September - 03 October 2020

Solar activity is expected to be very low for the outlook period.

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is expected to be at moderate to high levels on 07-09 Sep and again on 26 Sep - 03 Oct due to recurrent CH HSS influence. The remainder of the period is expected to be at normal to moderate levels.

Geomagnetic field activity is expected to be at unsettled levels on 18-19 Sep, unsettled to active levels on 23-29 Sep, with G1 (minor) storm levels possible on 27 sep, all due to recurrent CH HSS influences. The remainder of the outlook period is expected to be at mostly quiet levels.

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