[Propagation+Space Weather] Weekly Propagation Summary - 2020 Aug 03 16:10 UTC

[nw7us@sunspotwatch.com]

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Here is this week's space weather and geophysical report, issued 2020 Aug 03 0354 UTC.

Highlights of Solar and Geomagnetic Activity 27 July - 02 August 2020

Solar activity was very low throughout the period. Three spotted regions populated the disk at various times during the summary period. Region 2767 (S21, L=200, class/area Hsx/120 on 26 Jul) maintained an H-type configuration through the period and was quiet and stable. Region 2768 (N26, L=111, class/area Hsx/020 on 30 Jul) formed on the disk on 28 Jul and decayed to plage by 02 Aug. It was quiet and stable. Region 2769 (N26, L=059, class/area Axx/010 on 02 Aug) quietly rotated onto the disk.

An eruptive prominence was observed off the SE limb about midday on 31 Jul. A slow-moving CME was subsequently observed, but was determined to not have an Earth-directed component. No other CMEs or activity of note was observed during the summary period.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at normal to moderate levels through the period.

Geomagnetic field activity was at quiet levels through midday on 02 Aug when unsettled activity was observed due to positive polarity CH HSS influence. Solar wind observations indicated nominal conditions through about 02/0600 UTC when a CIR, in advance of a positive polalarity CH HSS, became evident in the data. Wind speeds increased from about 310 km/s to near 530 km/s, total field increased to 12 nT and the Bz component reached -10 nT. The geomagnetic field reacted with mostly unsettled conditions.

Forecast of Solar and Geomagnetic Activity 03 August - 29 August 2020

Solar activity is expected to be at very low levels throughout 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 normal to moderate levels throughout the outlook period.

Geomagnetic field activity is expected to be at unsettled to active levels through 03 Aug with a chance for G1 (Minor) geomagnetic storm levels due to recurrent CH HSS effects. Quiet to unsettled levels are expected on 04 Aug as HSS effects persist. Unsettled levels are expected once again on 29 Aug. Quiet levels are expected to prevail for the remainder of the period, 05-28 Aug.

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