AURORA :: Propagation Resource Center :: HFRadio.org
August 2010 -- Help is needed, monthly: monthly bandwidth/connectivity fees as well as other expenses must be paid to keep this space weather and radio propagation resource up and running. Last month we received just enough to cover the core expenses, but we still need to replace some aging hardware. If you find this site useful, would you please help out, today? I need your help to offset the cost of running this server and providing these web resources (space weather, amateur radio, shortwave listening, and more). If you can help, today, please make a donation to HFRadio.org - click the PayPal button, to help -->



I recommend the following...

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NEW! ACE HF Pro
Best propagation modeling and circuit simulation software for Amateur and Shortwave Radio Operators
ACE-HF Modeling Software


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PropLab Pro
Best ionospheric ray-tracing software for Radio Operators
PropLab Pro Ray-tracing Software


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Take a listen to the Space Weather Podcast!

NW7US Space Weather / Radio Proapgation Podcast; E4 - Subject: No more sunspots by 2015!? It is possible, if the trend revealed in current sunspot research at Kitt Peak, AZ, continues. Listen now!

Podcast home: NW7US Podcast


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Gain the on-air edge: This article explains how the ANTENNA is the key! -> Read this introduction to Antenna Modeling


Main Propagation Menu:

- Last Minute HF Forecast
- Current Forecast Section
- Sunspot Cycle/MUF/FOT Tables
- Current Optimal Frequencies
- Aurora Resources

- Educational Resources
- What's a CME?

How-To Articles:

- Is HF Propagation Reciprocal?
- De-mystifying HF Radio Propagation and Modeling

Check out the ACE-HF propagation software - the latest is version 2.05. ACE-HF is propagation forecasting and modeling for Amateur Radio as well as for Shortwave radio Listening and general HF operation. This software is even used by the military and other clients around the world. This software is developed and maintained by the same engineers that keep VOACAP up-to-date. As a result, this software is the most accurate user interface integrated with VOACAP. CHECK IT OUT, TODAY. This software is the most accurate modeling software available, and is endorsed by NW7US. Read the details to find out why.




Main Site Menu:

- Main NW7US Page
- About NW7US
- About Amateur Radio
- Discussion Forums (Hot!)
- Propagation Links
- Contact NW7US




Tomas David Hood - NW7US - that is me, the fellow that runs this website. I am a musician. You can listen to my music by clicking on the following banner, then click the 'Listen to All Tracks' button. If you would, please vote for each song. It helps me in my musical journey! (You can also leave me a comment on what you think about my music.)

SongVault.fm - The Best in Independent Music


Please help me keep this site running:

This website is kept alive by Tomas (NW7US), out of "spare change" (which there's not always enough of), and, by the kind, helpful people who visit this website. Would you like to help me keep this site running 24/7? If you are able to help me keep this website up and running, please: help me keep this site running for everyone... click on this donation button:


There are other ways that you can help me keep this site up and running. Here are a few other ways:

1. Send your donation via postal service. Make your donation payable to: Tomas Hood, PO Box 9, Stevensville, Montana 59870-0009.

2. Purchase ACE-HF PRO Propagation Software Version 2.05 - a small proceed will be sent to HFRadio.org to help keep the site running. Be sure to mention that you are buying this software through HFRadio.org.

3. Purchase one or more of the following Solar Terrestrial Dispatch (STD) products, and a small proceed will be sent to HFRadio.org:

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4. Make a purchase through the HFRadio.org affiliation with Amazon.com.



Other links of interest:

- PropNET - live propagation studies

Want to learn about Propagation and Space Weather? - Take the STD Space Weather Education Course, today!

- Shortwave Radio Resource Center
- Shortwave Broadcasting Search

Comments? Please use the feedback form. I look forward to hearing your comments.

Check out some of the other activities that I am involved in:
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More resources for you:

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Join the On-line Propagation Discussion Forum, today! We need your input and participation. The NW7US Discussion Forums include:

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This page was rendered on 22-Oct-14 2300 UTC.

Sun Spots: 120 as of 10/21/2014 :: Flux: 216 | Ap: 15 | Kp: 3
Solar Wind: 443 km/s at 5.0 protons/cm3, Bz is 0.0 nT
(Oct 22, 2014 at 2252 UT) :: [ Other Kp graphs ]
Aurora and Related Information

Up-to-the-minute graphical interface as to where the Aurora should be visible.

Aurora Forecast for today and tomorrow.

Aurora Images from the SEC/NOAA:

north pole aurora south pole aurora

Here is an updated, Observation Network, that you should visit. Tells you what is happening in the real-world.

PIXIE imaging | Other views of Aurora.

Where are you located, on the GEOMAGNETIC coordinates? The following maps allow you to compare the Kp Index (shown above) to a location, to find out where possible aurora sightings might occur. Check out the NOAA geomagnetic latitude map for your location:

[ North America ][ Eurasia ][South Africa & Australia ][ South America]

More on Aurora...

Aurora and the Kp Index - good information about how the Aurora is created, and how the Kp Index is a good indication of possible aurora.

Can Aurora be seen from your location? Here's a site with tips on viewing the Aurora.

Aurora Exploratorium - very excellent site.

Why do Aurora's happen? Here's an explanation from NASA.

Have you heard aurora? Check out NPR's story on a guy who records Aurora


Books on Aurora:

The Aurora Watcher's Handbook (Natural History) by Neil Davis

Starting at the basic level, the handbook begins with matters of immediate concern to someone who hopes to see an auroral display: what causes the aurora, when it is most often seen, and how best to capture it on film. Later sections provide a review of all aspects of auroral science... Order this great review of Aurora science, today!

Secrets of the Aurora Borealis (Alaska Geographic Series, Vol. 29, No. 1)

The dramatic celestial fire of the aurora borealis has intrigued mankind since ancient times. "Secrets of the Aurora Borealis" investigates the science and history behind the magic light of the aurora offering a comprehensive look into one of nature's most spectacular phenomena. Order this, today, and save over 30%.



IN THE NEWS: Auroral Kilometric Radiation (AKR)

Artist Conception of black aurora as observed by CLUSTER.  Courtesy of the European Space Agency. Researchers have known for three decades that the Earth is a potent radio transmitter, but they were never able to pinpoint where the noise was coming from. By using data from the four spacecraft of the European Space Agency's Cluster mission, NASA-funded scientists have now precisely located the source of that radio noise along magnetic field lines several thousand miles above bright regions in Earth's northern lights.

Though AKR is not detectable from the Earth's surface - the ionosphere blocks most radio waves from space at those frequencies - it is the most important and intense naturally occurring radio emission from Earth. Sounding like sporadic bursts of high-pitched whistles and squawks, AKR is emitted by Earth about one-third to one-half of every day at a signal strength as high as one billion Watts.

The most potent commercial radio signals on Earth are only 100,000 Watts, meaning that AKR would drown out much of our AM radio signals were it not for the ionosphere (a tenuous layer of electrified gas at the boundary between Earth's atmosphere and space).

To read more about this, check out the news article at http://spacedaily.com - and, visit the headquarters for the CLUSTER mission.