Weekly Propagation Summary – 2018 May 07 16:10 UTC

Weekly Propagation Summary (2018 May 07 16:10 UTC)

Here is this week’s space weather and geophysical report, issued 2018 May 07 0147 UTC.

Highlights of Solar and Geomagnetic Activity 30 April – 06 May 2018

Solar activity was very quiet throughout the reporting period. Region 2706 (N03, L=281, class/area Dao/130 on 22 Apr) produced the strongest event of the past week, a B1 flare on 01/2115 UTC. Activity on the farside of the Sun produced a halo CME signature first observed in LASCO C2 imagery at 03/1712 UTC; however, no Earth-directed CMEs were observed in available coronagraph imagery.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit ranged from normal to moderate levels from 30 Apr to 05 May. Influence from a negative polarity CH HSS caused an increase to high levels on 06 May with a peak flux of 11,500 pfu observed at 06/2305 UTC.

Geomagnetic field activity was mostly quiet until 05 May, when enhancements in the solar wind from the onset of a negative polarity CH HSS increased geomagnetic activity to G1 (Minor) storm levels. A further increase to G2 (Moderate) geomagnetic storm levels were observed early on 06 May. Solar wind speeds peaked at just over 700 km/s and persisted just below 700 km/s through the end of the reporting period. Total field peaked during the CIR, with a maximum of 17 nT observed at 05/1340 UTC. The maximum southward value of Bz was -14 nT which was observed 05/1327 UTC.

Forecast of Solar and Geomagnetic Activity 07 May – 02 June 2018

Solar activity is expected to remain at very low levels over the next 27 days.

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 from 07-26 May and 02 Jun. Normal to moderate levels are expected over 27 May – 01 Jun. All enhancements in electron flux are attributed to the anticipation of influence from multiple, recurrent CH HSSs.

Geomagnetic field activity is expected to range from quiet to G2 (moderate) geomagnetic storm levels. G2 (Moderate) storm levels are likely on 17 May; G1 (Minor) storm levels are likely on 07 May and 02 Jun; active conditions are likely on 08-09 May, 18 May and 01 Jun; unsettled levels are likely on 10 May and 19 May. The remainder of the outlook period is expected to be mostly quiet. All enhancements to geomagnetic activity are due to multiple, recurrent CH HSSs.

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

Check out the stunning view of our Sun in action, as seen during the last five years with the Solar Dynamics Observatory (SDO): https://www.youtube.com/watch?v=zXN-MdoGM9g

= = = = =

BOOK SALE: Space Weather and Sun Science – get these from Amazon, and help us stay online!

NOTICE: When you buy this (or any item after starting with this link), you are helping us keep our SunSpotWatch.com and other resources “on the air” (up and running!). In other words, you are helping the entire community. So, check out this book:

Here is the link to Amazon: http://g.nw7us.us/fbssw-aSWSC

We’re on Facebook: http://NW7US.us/swhfr

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: