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  Weekly Space Weather Highlights
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Highlights of Solar and Geomagnetic Activity
19 - 25 July 2021

Solar activity was very low on 22 and 25 July with only B-class
flares observed. Low levels of solar activity were observed on
19-21, and 23-24 July due to C-class flare activity. A total of six
C-flares were observed this period, five C1 flares and a C4 flare at
24/0033 UTC. Regions 2845 (S15, L=195, class/area=Dso/60 on 21 July)
and 2849 (S18, L=058, class/area=Axx/20 on 22 July) were the primary
producers of C-class flare activity this period. A slow-moving CME
observed on 25 July from the vicinity of plage region 2848 (N21,
L=120 on 25 July) may disrupt the near-Earth solar wind environment
on 29 July. Multiple other CMEs were observed in LASCO coronagraph
imagery throughout the week, however, none were Earth-directed. 

No proton events were observed at geosynchronous orbit.

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

Geomagnetic field activity reached unsettled and active levels on 22
July due to positive polarity CH HSS influence. Quiet to unsettled
conditions were observed on 19-20 July, and quiet levels were
observed on 21 and 23-25 July under a nominal solar wind regime. 

Forecast of Solar and Geomagnetic Activity
26 July - 21 August 2021

Solar activity is expected to be very low-to-low throughout the
outlook period with B-class flares expected and a chance for C-class
flares. 

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 reach active levels on
28-29 July due to positive polarity CH HSS influence and the
possible glancing blow of a CME from 25 July. Active conditions are
expected on 10 Aug, with unsettled conditions expected on 11 Aug,
due to recurrent negative polarity CH HSS influence. Unsettled
conditions are expected on 16-17 Aug due to recurrent positive
polarity CH HSS influence. Mostly quiet conditions are expected to
prevail throughout the remainder of the outlook period.