Tag Archives: Space Weather

NASA’s SDO produces a 10 year time-lapse video of the sun

Many thanks to SWLing Post contributor, Ahmet (KD2AQU), who shares the following item from NASA:

As of June 2020, NASA’s Solar Dynamics Observatory – SDO – has now been watching the Sun non-stop for over a full decade. From its orbit in space around Earth, SDO has gathered 425 million high-resolution images of the Sun, amassing 20 million gigabytes of data over the past 10 years. This information has enabled countless new discoveries about the workings of our closest star and how it influences the solar system.

With a triad of instruments, SDO captures an image of the Sun every 0.75 seconds. The Atmospheric Imaging Assembly (AIA) instrument alone captures images every 12 seconds at 10 different wavelengths of light. This 10-year time lapse showcases photos taken at a wavelength of 17.1 nanometers, which is an extreme ultraviolet wavelength that shows the Sun’s outermost atmospheric layer – the corona. Compiling one photo every hour, the movie condenses a decade of the Sun into 61 minutes. The video shows the rise and fall in activity that occurs as part of the Sun’s 11-year solar cycle and notable events, like transiting planets and eruptions. The custom music, titled “Solar Observer,” was composed by musician Lars Leonhard.

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Solar Minimum: Deep, Deeper…and even Deeper?

Solar Minimum is DEEP and appears to be continuing.  Observer Franky Dubois from Belgium – who posts for the Solar Section of A.L.P.O. – Assoc. of Lunar & Planetary Observers (http://alpo-astronomy.org/) has fully observed three complete Solar Cycles over the past 38-years and he’s graphed the Sunsport R Number – defined as R = K (10g + s), where g is the number of sunspot groups and s is the total number of distinct spots. 

This is what he posted yesterday on the A.L.P.O. Solar Message Group:

Minimum cycle 21: 11.4 April 19[8]6

Minimum cycle 22: 10.4 May 1996

Minimum cycle 23: 2.88 November 2008

Status of cycle 24 thus far: 1.6

Many experts in December (2019) speculated we had reached “Solar Minimum” (error factor of +/- 6-months).  Well, it’s 5-months later and we’ve only seen a couple of next cycle [reversed polarized areas] sunspots/small groups – most of which died-out very quickly and did not sustain a full transit across the observable disc of the sun.  We’ve seen no real evidence – yet – that we’re on the other side or up-side of Minimum.  As an amateur/hobbyist astronomer & Solar Observer myself, I’ve seldom taken the time to set-up my gear & observe (even in wavelengths other than visible).

It’s been discussed here and elsewhere before, but looking at the last 53-years of data there has been a very, very sharp decline in Solar Maximums [and Minimums] sunspot numbers.

Guest Post by Troy Riedel

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Radio Waves: B&W to Color, Antenna Wins, Hearing Voices in the Walls, and Beached Whales

Radio Waves:  Stories Making Waves in the World of Radio

Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest SWLing Post readers.  To that end: Welcome to the SWLing Post’sRadio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

Many thanks to SWLing Post contributors Ron, Paul Walker, and Troy Riedel for the following tips:


Colorizing black and white photos (Antique Radio Forum)

Ron shares this link to a discussion about vintage black and white photos that have been auto-colorized.[]

State law protects ham radio operator, frustrates neighbors in Windsor Twp. (York Dispatch)

A Windsor Township resident whose neighbors are upset over her amateur radio tower is within her rights to have the antenna on her property, township officials confirmed Monday.

An engineer went out to the site in the 400 block of White Rose Lane to inspect the 40-foot tower and ensure it didn’t pose a safety threat to neighbors, township engineer Chris Kraft told the board of supervisors at a meeting Monday.

“Based on that review, we feel the tower is structurally safe,” he said.

Lindsey Fowler is the homeowner who built the tower on her property last September. Fowler is a licensed amateur radio operator, according to Federal Communications Commission records, and her license is valid through December 2021.

[…]Marc McClure, one of the neighbors who lives near Fowler, told the board in October that he and several other neighbors were opposed to the tower and said it should be removed, according to minutes from the Oct. 21 board meeting.

McClure said the tower was an eyesore in the neighborhood and that he and others were concerned about the structural safety of the tower were it to fall, as well as the potential unknown health hazards from exposure to radio frequencies.

The neighbors were also worried about a decrease in their property values, McClure said.

[…]In Pennsylvania, amateur radio operators’ rights are protected by state statute, and municipalities are not allowed to unreasonably restrict the installation of towers fewer than 65-feet high.

And now that the township has confirmed there’s no safety risk to Fowler’s neighbors, township officials said the dispute is outside of their purview.[]

Lockport family says mysterious voices, music come from house’s walls; local radio station may be source (ABC 7)

LOCKPORT, Ill. (WLS) — A family in Lockport said strange sounds, including music and talk radio, has been coming out of their walls and keeping them up at night off and on for about six years.

“There are voices in the wall and I don’t know what it is,” said 9-year-old Brianna Smith.

It may sound like an episode of the popular Netflix show “Stranger Things,” but the mysterious sounds Brianna is hearing are real.

“It has been waking me up at night,” she said.

The sounds are coming from the bedroom walls of her home in the middle of the night.

“It kind of keeps us up at night,” explained Brianna’s father Richard.

Richard said the family doesn’t have any speakers in their walls. He captured some of the late night noise on his phone and sent it to the ABC7 I-Team. The music was faint, but the I-Team could hear it.

“It’s one of our favorite songs, but not at 10 o’clock at night,” Richard said.

Richard Smith called Lockport police, who took two detailed reports about the bizarre problem. In one, the officer noted that he could hear “voices and music” and “talking about Christ.” Then the officer said he heard a commercial for the Christian radio station AM 1160.[]

The Surprising Way Solar Storms Can Beach Whales (Spaceweater.com)

Space weather isn’t just for humans. Whales are experiencing it, too. A new study published this week in the research journal Current Biology shows that solar storms can confuse whales and cause them to strand on beaches–and the mechanism is surprising. Get the full story on Spaceweather.com.[]


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Radio Waves: Sun Up-Close, Super NZ Public Broadcaster, One SDR, and ABC Emergency Broadcasting

Radio Waves:  Stories Making Waves in the World of Radio 

Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest SWLing Post readers.  To that end: Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

Many thanks to SWLing Post contributors, Paul Evans, Troy Riedel, Michael Bird, and Marty for the following tips:

Sun’s surface seen in remarkable new detail (BBC News)

Source: Daniel K Inouye Solar Telescope

Behold the Sun’s convulsing surface at a level of detail never seen before.

The Daniel K Inouye Solar Telescope on Hawaii has released pictures that show features as small as 30km across.

This is remarkable when set against the scale of our star, which has a diameter of about 1.4 million km (870,000 miles) and is 149 million km from Earth.

The cell-like structures are roughly the size of the US state of Texas. They are convecting masses of hot, excited gas, or plasma.

The bright centres are where this solar material is rising; the surrounding dark lanes are where plasma is cooling and sinking.[]

The New Zealand Cabinet plans to create a new, super-sized public broadcaster (Asia-Pacific Broadcasting Union)

It is understood the NZ cabinet has signed off on a high-level decision to proceed and to commission a business case, after the Minister for Broadcasting, Kris Faafoi, presented a revised paper on Monday.

There was pushback from some senior Labour and New Zealand First ministers about the way the preferred option was landed on, the implications for public broadcasting if RNZ ceased to be a standalone company, and the speed at which it had been progressing.

The plan was to work towards having the new media company in place by about 2023 and that appears to still be the goal.

RNZ was told the amended proposal puts a specific emphasis on the fact the new company will be primarily a public service media outlet, and to ensure that is made crystal clear in any legislation, and through a charter.[]

One SDR: A new website focusing on the basics of software defined radio

Good morning. I have been following SWLing over the years and it’s an amazing resource.

I’m writing from https://onesdr.com which is an Education website with articles that simplify Software-defined Radio. I write about practical aspects of SDR including associated components such as Low Noise Amplifiers, Filters, Bias Tees, etc. My goal is to demystify RF technology and make it more accessible to the growing community of SDR enthusiasts.

As well I have been contributing to several RF-related Wikipedia pages* to popularize RF and Wireless in general.

Interim Report of Survey of ABC Emergency Broadcasting in Bushfire Affected Communities (ABC Friends)

95% of respondents to ABC Friends’ Survey of ABC emergency broadcasting in bushfire affected communities believe there is a need for a national plan of additional essential communications infrastructure.

This devastating bushfire season attests to the ABC’s position as Australia’s pre-eminent emergency broadcaster. The number of ABC emergency broadcasts has risen from 256 in 2017-2018 to 371 in 2018-2019 to 673 to date this year (4 Jan). The ABC’s emergency broadcasts continue in the face of ongoing funding cuts and with no additional funding to cover the resources which have been poured into the effort.

On 3 January, via Facebook, ABC Friends National asked for feedback about the ABC’s emergency broadcasts from those affected by the bushfires. Whilst highly praised, there were reports that access to ABC broadcasts was sometimes a problem.

ABC Friends subsequent media release made an urgent call for the Federal Government to restore funding that guarantees infrastructure and transmission that is vital for emergency services broadcasting. It also advised of the launch of a survey (see appendix 1) to obtain more formal feedback about access to emergency broadcasts. This survey was delivered on 13 January via Facebook and via email through our membership and supporter base.

750 people responded to the survey.

91.1% of those surveyed said that the ABC local emergency broadcasts were important to them during the crisis.

96.1% of those surveyed said that ABC staff with local knowledge was important to them.

98.5% of those surveyed said that it was important to them that their local ABC outlet remain open and well-staffed.[]


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Radio Waves: Podcast Preservation, Art Bell Plaque, BBC News Cuts, Space Storms, and DK7IH’s Homebrew Transceiver

Radio Waves:  Stories Making Waves in the World of Radio 

Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest SWLing Post readers.  To that end: Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

Many thanks to SWLing Post contributors, Mike Terry, Troy Riedel, and Jeff Murray for the following tips:


Radio Survivor Podcast #230 – The Library of Congress Launches Podcast Preservation Project (Radio Survivor)

On this week’s episode we learn about a brand new project at the Library of Congress that is focused entirely on archiving podcasts. Ted Westervelt, Manager of the Podcast Preservation Project at Library of Congress, joins us to share early details from this new initiative. He explains that the hope is that a wide variety of all types of podcasts will be part of the collection, including the Radio Survivor Podcast.[]


Memorial Plaque Honoring Art Bell Unveiled at Park in Pahrump, Nevada (Coast to Coast)

Coast to Coast AM founder Art Bell has been honored with a memorial plaque at a park in the Nevada city of Pahrump. The beloved radio personality, who passed away in April of 2018, was a longtime resident of the community and famously broadcast from his home there. The marker, which was unveiled by Nye County on their Facebook page this past Friday and is located at Calvada Eye park, was funded by a group known as the ‘Friends and Fans of Art Bell’ with additional financial support and installation provided by the county.[]


BBC News to close 450 posts as part of £80m savings drive (BBC News)

Around 450 jobs will be cut from BBC News under plans to complete its £80m savings target by 2022.

Outlets to be hit by job closures include BBC Two’s Newsnight, BBC Radio 5 Live and the World Update programme on the World Service.

BBC News boss Fran Unsworth said there had to be a move away from traditional broadcasting and towards digital.

But broadcasting union Bectu said the changes mean staff will be “under even more pressure to deliver”.


How likely are space super-storms? (EarthSky)

A new analysis shows that “severe” space super-storms happened 42 years out of the last 150, and “great” super-storms happened 6 years out of 150. These storms can disrupt modern electronics, aviation and satellite systems and communications.

A new joint study by the University of Warwick and the British Antarctic Survey used historical data to extend scientists’ previous estimates of the likelihood of space super-storms. These storms may originate with solar flares, seen to erupt explosively on the sun during years of high solar activity. Space super-storms aren’t harmful to humans, because our atmosphere protects us, but they can be hugely disruptive to our modern technologies. They can cause power blackouts, take out satellites, disrupt aviation and cause temporary loss of GPS signals and radio communications, scientists say. The new work shows that what the scientists called “severe” space super-storms occurred 42 years out of the last 150 years. What they called “great” super-storms occurred in 6 years out of 150. The new work also sheds light on what’s called the Carrington event of 1859, the largest super-storm in recorded history.[]

Also check out: Are Solar Storms Dangerous To Us?


DK7IH’s New HOMEBREW Transceiver Raises the Bar for All of Us (Soldersmoke Podcast)

And that, my friends, is a HOMEBREW transceiver. Wow, amazingly well done. After I showed this to Pete N6QW (no slouch in the homebrew packaging department), in frustration with his self-perceived shortcomings he threatened to give up on homebrewing and to throw away all his rigs. Don’t do it Pete!

Peter Rachow, DK7IH has carefully documented his project through as series of blog posts:
Here is Part 1. Part 9 deals with mechanical construction, packaging and what George Dobbs used to call “socketry.”[]


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