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Alaskan seismometers record the northern lights
Pys.org ^ | 07/29/2020 | Seismological Society of America

Posted on 07/29/2020 7:04:47 PM PDT by BenLurkin

By comparing data collected by all-sky cameras, magnetometers, and seismometers during three aurora events in 2019, University of Alaska Fairbanks seismologist Carl Tape and colleagues show that it's possible to match the striking display of lights with seismic signals, to observe the same phenomenon in different ways.

Researchers have known for a while that seismometers are sensitive to magnetic fluctuations—and have worked hard to find ways to shield their instruments against magnetic influence or to remove these unwanted signals from their seismic data. But the aurora study offers an example of how seismometers could be paired with other instruments to study these fluctuations.

The aurora borealis, or northern lights, occurs when solar winds—plasma ejected from the Sun's surface—meet the protective magnetic field that surrounds the Earth. The collision of particles produces colorful lights in the sky and creates fluctuations in the magnetic field that are sometimes called solar or space "storms." Magnetometers deployed on the Earth's surface are the primary instrument used to detect these fluctuations, which can significantly impact electrical grids, GPS systems and other crucial infrastructure. The aurora is commonly visible in wintertime in high-latitude regions such as Alaska.

The seismometers in the study are part of the USArray Transportable Array, a network of temporary seismometers placed across North America as part of the EarthScope project. The array in Alaska and western Canada was completed in the fall of 2017. The aurora paper is one of several included in an upcoming SRL focus section about EarthScope in Alaska and Canada.

These temporary seismic stations are not shielded from magnetic fields, unlike more permanent stations that are often cloaked in mu-metal, a nickel-iron alloy that directs magnetic fields around the instrument's sensors.

(Excerpt) Read more at phys.org ...


TOPICS: Astronomy; Science
KEYWORDS: alaska; astronomy; aurora; auroraborealis; catastrophism; magnetism; northernlights; science; seismometers

1 posted on 07/29/2020 7:04:47 PM PDT by BenLurkin
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To: BenLurkin; cracker45; Tainan; Jet Jaguar; SENTINEL; redpoll; ArmyTeach; Eska; hattend; hosepipe; ...

Thank You for the thread BenLurkin.

Alaska Ping.

2 posted on 07/29/2020 7:08:20 PM PDT by KC_Lion
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To: BenLurkin
Sheesh, those northern lights are getting intense!

DANG!

3 posted on 07/29/2020 7:13:34 PM PDT by Tolerance Sucks Rocks (The Constitution guarantees the States protection against insurrection. Act now, Mr. President!)
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To: BenLurkin

I wonder if it’s hard to do an MRI up there when those things are going.


4 posted on 07/29/2020 7:13:47 PM PDT by Beowulf9
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To: BenLurkin

Sounds like an exercise in goofy but I hope they got some data


5 posted on 07/29/2020 7:25:24 PM PDT by mylife (Opinions: $1, Today's Special: Half baked: 50c)
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To: Beowulf9

Magnet Room is shielded to prevent outside interference, but often some copper tabs get broken/bent that aren’t properly maintained so it’s possible-just not sure if magnitude is sufficient. Lower strength [likely older as well]magnets would see more than higher.. I’ve watched sigs fluctuate from nearby other MRs in same wing due to broken tabs.


6 posted on 07/29/2020 7:27:24 PM PDT by reed13k (For evil to triumph it is only necessary that good men do nothing)
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To: BenLurkin

So... Seis matters after all... Figured as much...


7 posted on 07/29/2020 7:27:27 PM PDT by SuperLuminal (Where is Sam Adams now that we desperately need him)
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To: BenLurkin

Ben, thanks for posting. Interesting!

Seismometers can sense aurora, and we can hear them!

https://www.youtube.com/watch?time_continue=41&v=NRZfKqhs6rM&feature=emb_logo


8 posted on 07/29/2020 7:28:09 PM PDT by Pete from Shawnee Mission
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To: Tolerance Sucks Rocks

St Elmo’s fire almost offed me up! And there was this comet... hale bopp


9 posted on 07/29/2020 7:28:10 PM PDT by mylife (Opinions: $1, Today's Special: Half baked: 50c)
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To: BenLurkin

I guess Jesus was right when he said the rocks themselves will cry out. I know he didn’t mean magnetism but.....


10 posted on 07/29/2020 7:30:16 PM PDT by HighSierra5
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To: reed13k

Interesting.


11 posted on 07/29/2020 7:37:08 PM PDT by Beowulf9
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To: Tolerance Sucks Rocks

Good flick. Depressing, but good.


12 posted on 07/29/2020 7:41:11 PM PDT by BenLurkin (The above is not a statement of fact. It is either opinion or satire. Or both.)
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To: BenLurkin

Thanks. Seeing tha northern lights has been on my bucket list for years, haven’t made it yet.


13 posted on 07/29/2020 7:50:15 PM PDT by Rusty0604 (2020 four more years!)
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To: BenLurkin

When engineers were designing the Trans-Alaska Pipeline they had to account for the current produced by the Aurora. It is measurable 6” below the surface of the ground and could play havoc with the pipeline sensors that monitored the flow of oil.

When I worked on the North Slope I witnessed the most amazing display of Aurora that I will ever see. I wound up laying on the ground looking straight up. Imagine being inside a glass dome with someone pouring fluorescent green paint over the top of it and it shimmered down to the horizon for 270*. It was +30* and calm so nobody froze that February night.


14 posted on 07/29/2020 8:07:34 PM PDT by 43north (Its hard to stop a man when he knows he's right and he keeps coming.)
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To: SunkenCiv

ping


15 posted on 07/29/2020 9:17:17 PM PDT by BenLurkin (The above is not a statement of fact. It is either opinion or satire. Or both.)
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To: BenLurkin

Thanks! Will ping after travel.


16 posted on 07/29/2020 9:23:41 PM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: 43north

Of all my rotations to the slope, including 5 trips this past winter season I have yet to see them on the slope.

When I started working up there through the winter one of the main reasons was to see the lights.

Good thing there is the upcoming winter season, and beyond.

I’ll keep coming back.


17 posted on 07/29/2020 10:09:19 PM PDT by Oil Object Insp
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To: Oil Object Insp

I worked up there for 26 years. Hope it doesn’t take that long for you to see a magnificent display! After Thanksgiving you’ll have plenty of darkness though LOL!

I lived in the Soldotna area for 9 years and saw some amazing displays there too.

I live in north Idaho now and we rarely see the Aurora here. One of the things I miss about not living in Alaska anymore.


18 posted on 07/30/2020 6:11:14 AM PDT by 43north (Its hard to stop a man when he knows he's right and he keeps coming.)
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To: 75thOVI; Abathar; agrace; aimhigh; Alice in Wonderland; AnalogReigns; AndrewC; aragorn; ...
Thanks BenLurkin.



19 posted on 08/02/2020 2:16:11 PM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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