Weekly Propagation Summary – 2020 Jul 27 16:10 UTC

Weekly Propagation Summary (2020 Jul 27 16:10 UTC)

Here is this week’s space weather and geophysical report, issued 2020 Jul 27 0132 UTC.

Highlights of Solar and Geomagnetic Activity 20 – 26 July 2020

Solar activity was very low throughout the period. New Region 2767 (S21, L=200, class/area Hsx/120 on 26 Jul) rotated onto the disk on 21 Jul, but was quiet and stable. A slow-moving, partial halo CME was detected in coronagraph imagery in the NE quadrantat at about 19/1135 UTC. Subsequent model analysis indicated an Earth-directed component would likely become geoeffective on 24-25 Jul. No other CME activity was detected during the 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 throughout the period.

Geomagnetic field activity was at quiet levels 20-23 Jul. Field conditions reached unsettled to active levels on 24-25 Jul due to effects from the 19 Jul CME. A return to quiet conditions was observed on 26 Jul. Solar wind parameters reflected enhanced conditions on 24-25 Jul as a result of CME effects. Solar wind speeds increased from approximately 300 km/s to near 415 km/s. Total field peaked at 11 nT while the Bz component dropped south to -10 nT. Density levels increased to 28 particles/cc. Ambient solar wind parameters were present on 20-23 Jul and 26 Jul.

Forecast of Solar and Geomagnetic Activity 27 July – 22 August 2020

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

Geomagnetic field activity is expected to be quiet to unsettled on 28-29 Jul due to a negative polarity CH HSS. Quiet conditions are expected to prevail throughout the rest of the outlook period.

Don’t forget to visit our live space weather and radio propagation web site, at: http://SunSpotWatch.com/

Live Aurora mapping is at http://aurora.sunspotwatch.com/

If you are on Twitter, please follow these two users: 1. https://Twitter.com/NW7US 2. https://Twitter.com/hfradiospacewx

– – – – – – – – – – – – –

Be sure to subscribe to our space weather and propagation email group, on Groups.io


Spread the word!

– – – – – – – – – – – – –

Links of interest:

+ Amazon space weather books: http://g.nw7us.us/fbssw-aSWSC
+ https://Twitter.com/NW7US
+ https://Twitter.com/hfradiospacewx

Space Weather and Ham Radio YouTube Channel News:

I am working on launching a YouTube channel overhaul, that includes series of videos about space weather, radio signal propagation, and more.

Additionally, I am working on improving the educational efforts via the email, Facebook, YouTube, Tumblr, and other activities.

You can help!

Please consider becoming a Patron of these space weather and radio communications services, beginning with the YouTube channel:


The YouTube channel:


Visit, subscribe: NW7US Radio Communications and Propagation YouTube Channel

Leave a Comment

Subscribe FREE to AmateurRadio.com's
Amateur Radio Newsletter
News, Opinion, Giveaways & More!

Join over 7,000 subscribers!
We never share your e-mail address.

Also available via RSS feed, Twitter, and Facebook.

Subscribe FREE to AmateurRadio.com's
Amateur Radio Newsletter

We never share your e-mail address.

Do you like to write?
Interesting project to share?
Helpful tips and ideas for other hams?

Submit an article and we will review it for publication on AmateurRadio.com!

Have a ham radio product or service?
Consider advertising on our site.

Are you a reporter covering ham radio?
Find ham radio experts for your story.

How to Set Up a Ham Radio Blog
Get started in less than 15 minutes!

  • Matt W1MST, Managing Editor

Sign up for our free
Amateur Radio Newsletter

Enter your e-mail address: