Volcano Long Valley Caldera swelling magma chamber

[Jimbopithecus]

Long Valley Caldera awakening

View: https://www.youtube.com/watch?v=DBiZP1Lc-Ms

run time 3:10

Alarming signs of volcanic activity and imminent eruption of the LONG VALLEY CALDERA SUPERVOLCANO in California - Strange Sounds

There are alarming signs of volcanic activity and imminent eruption of THE LONG VALLEY CALDERA SUPERVOLCANO in California.

strangesounds.org

The supervolcano and its recent activity was explored during the channel’s 2017 documentary, ‘Secrets of the Underground’.
Rob Nelson, a scientist and the show’s narrator, said: “There are alarming signs of possible volcanic activity.
“And there are clues pointing towards an imminent eruption scattered throughout this valley — the site of the second largest explosive volcanic eruption in North America.”
Even if a modern-day eruption from Long Valley was not on the same scale as previous events, it still poses an “existential threat” to the millions who live around it.
An investigation carried out by the Science Channel in a part of the valley found several instances of smoke billowing out from beneath the ground.

Jared Peacock, a geophysicist, also pointed out an alarming feature of the caldera that could spell trouble using InSAR data that has monitored the region for the last 20 years.
One of the most troubling areas InSAR pinpointed happened to be very close to Mammoth Lakes, a town in the Sierra Nevada mountains.
Pointing to a map created from the data, Mr Peacock said: “Right here in the middle, you see there’s a resurgent dome.”
Magma dome under the Long Valley Caldera Supervolcano. Picture via Youtube video

A baking-hot red point is pictured located directly beneath the ground, where magma likely resides.
Mr Peacock added: “Something underneath it is pushing it upwards.”
In order to determine whether the Long Valley Caldera was truly coming back to life, Mr Peacock and Mr Nelson set up a pair of sensor pipes directly above the point that the InSAR data identified the resurgent dome, and scanned for signs of trouble deep underground.
The pipes helped detect changes in the Earth’s magnetic field, enabling the two scientists to determine whether any liquid was underground.
Running the tests, they discovered massive amounts of liquid beneath the domes’ surface: clear signs of volcanic activity.
But this activity was not centralised, which would be cause for concern. Rather, it was sparse and spread out.

Data suggest that something like magma may be pushing to the surface. Picture via Youtube video
Mr Peacock said: “We can say conclusively that there is no giant magma chamber below. But there are smaller satellite ones around the area.”

A year later, and a study published in the science journal, GeoScienceWorld, found evidence of ground deformation at the supervolcano.
Geologists who led the study found “ongoing uplift suggests new magma may have intruded into the reservoir” since at least 1978.
The uplift could be evidence of moving molten rock or the crystallisation of material deep beneath the ground.
The study reads: “Despite 40 years of diverse investigations, the presence of large volumes of melt in Long Valley’s magma reservoir remain unresolved.”
The scientists estimated the Long Valley Caldera reservoir contains “considerable qualities of melt”, likely greater than 240 cubic miles (1,000 cubic kilometres).

About 27 percent of this melt could be hot enough to be scorching liquid rock.
According to the United States Geological Survey (USGS), Long Valley last erupted about 100,000 years ago. [Express]
Now if you enjoyed this article, I recommend you watching Cascadia, The Big One:


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• TAGS
• california
• eruption
• november 2021
• video
• volcano

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[Dozdoats]

Let it blow, let it blow, let it blow.

 

[Matt]

Cascadia is acting up as well.... this is why nobody cares about San Francisco, Portland, or Seattle. The people with skills have been incentivized to leave and the junkies and grifters have been invited to move on in....... kill zones!

 

[cyberiot]

If it blows at the supervolcanic level, the Phoenix area is toast.

Volcanic ash is a nasty thing to have on your roof, especially if it gets wet. Very heavy and destructive. Get yer ladder and push broom while ya can . . .

 

[Jimbopithecus]

I hope I did that right As a geologist I have long contended that Long Valley is of more concern than Yellowstone.

 

[To-late]

Well,,,the video concludes there is NO larger centralized magma chamber area.
so no worries folks.

 

[bbbuddy]

What's the time frame on Long Valley eruptions?

 

[packyderms_wife]

I hope I did that right As a geologist I have long contended that Long Valley is of more concern than Yellowstone.

This^^^ The Three Sisters are also more of a threat than YS.

 

[packyderms_wife]

Well,,,the video concludes there is NO larger centralized magma chamber area.
so no worries folks.

From Google:

Is there any indication that the Long Valley magma system is still active?

The volcanic system is still active. Scientists have determined that eruptions occurred in both the Inyo Craters and Mono Craters parts of the volcanic chain as recently as 600 years ago and that small eruptions occurred in Mono Lake sometime between the mid-1700's and mid-1800's.

More information at the link.

Living With a Restless Caldera, Long Valley, California, VolcanoFact Sheet

pubs.usgs.gov

 

[Blacknarwhal]

"Imminent" in geological terms is 10,000 to 50,000 years, as I recall.

 

[Delta]

I think I have a greater chance of dying from an infected hangnail than from a Long Valley eruption. Still awaiting Wormwood.

 

[Jimbopithecus]

"Imminent" in geological terms is 10,000 to 50,000 years, as I recall.

Tell that to David Johnston Mount St Helens eruption: Tragic final moments of volcanologist killed by volcano emerge

 

[JMG91]

From Google:

Is there any indication that the Long Valley magma system is still active?

The volcanic system is still active. Scientists have determined that eruptions occurred in both the Inyo Craters and Mono Craters parts of the volcanic chain as recently as 600 years ago and that small eruptions occurred in Mono Lake sometime between the mid-1700's and mid-1800's.

More information at the link.

Living With a Restless Caldera, Long Valley, California, VolcanoFact Sheet

pubs.usgs.gov

It's spread out though, not centralized as would be required for a proper eruption. I wonder how easily it could become centralized though.

 

[Millwright]

Haven't we seen reports of it swelling for years now?

 

[packyderms_wife]

Haven't we seen reports of it swelling for years now?

Yep, and there’s have been toxic gas releases for decades

 

[cleobc]

Couple hours down the road. I wonder about the "millions who live around it" that they're talking about. Major mountain range between the Long Valley Caldera and California, and prevailing winds come from the west. To the north, east and south, you have to go quite a distance--hours of driving-- before you encounter much population. Easy to see on a map. I understand that if it blew in a major way, it could impact the US to the east with ash, but as far as it blowing up, I feel pretty safe several hours away. Except of course if we got some sympathetic volcanic activity here. There were those irrigation wells that brought up hot water...

 

[Doc1]

I hope I did that right As a geologist I have long contended that Long Valley is of more concern than Yellowstone.

Please don't tell Jimbo's family that he's a geologist. They think he's a piano player in a whorehouse...

Best
Doc

 

[20Gauge]

Please don't tell Jimbo's family that he's a geologist. They think he's a piano player in a whorehouse...

Best
Doc

At least they think he is doing something respectable.

 

[parsonswife]

Couple hours down the road. I wonder about the "millions who live around it" that they're talking about. Major mountain range between the Long Valley Caldera and California, and prevailing winds come from the west. To the north, east and south, you have to go quite a distance--hours of driving-- before you encounter much population. Easy to see on a map. I understand that if it blew in a major way, it could impact the US to the east with ash, but as far as it blowing up, I feel pretty safe several hours away. Except of course if we got some sympathetic volcanic activity here. There were those irrigation wells that brought up hot water...

When I lived in Reno (20yrs ago) we had multiple emergency response training sessions on what to do if Mammoth lakes/long valley volcanos blew like Mt St Helens. They predicted that someday there will be 9pt earthquake between Reno and Mammoth.

 

[ShadowMan]

Better hope this thing doesn't pull a St. Helens eruption, cause a lot of people would be seriously screwed!

 

[Melodi]

The scattered magma pools only mean that the eruptions if they occur are likely to be smaller than the historical "supervolcano" eruptions that this area is capable of.

Like Yellowstone, most articles neglect the fact that it isn't an "all or nothing" scenario in either place. While it is perfectly possible that either supervolcano region could have a full-blown mega-eruption, it is also totally possible that there could be one or more small eruptions when magma leaks out from one area, rather than the entire basins all at once.

In reality, from orbital photos, the entire region is really one giant mess of connected magma chambers from Yellowstone pretty much all the way to Mammoth Lakes. That includes all of the Western Coastal Volcanoes and some others.

We know they don't all erupt at the same time, though they can set each other off. The Native Americans knew this having observed them for at least 20,000 plus years and a local West Coast saying is: "When Grandfather speaks Little Sister's Answer."

Usually, Grandfather is Lassen, but the point is if Lassen (or in some cases Shasta) erupts, the other "sisters" will erupt afterward (or some of them will).

 

[cyberiot]

Yep, and there’s have been toxic gas releases for decades

Didn't realize you'd met my ex . . .

 

[TorahTips]

The scattered magma pools only mean that the eruptions if they occur are likely to be smaller than the historical "supervolcano" eruptions that this area is capable of.

Like Yellowstone, most articles neglect the fact that it isn't an "all or nothing" scenario in either place. While it is perfectly possible that either supervolcano region could have a full-blown mega-eruption, it is also totally possible that there could be one or more small eruptions when magma leaks out from one area, rather than the entire basins all at once.

In reality, from orbital photos, the entire region is really one giant mess of connected magma chambers from Yellowstone pretty much all the way to Mammoth Lakes. That includes all of the Western Coastal Volcanoes and some others.

We know they don't all erupt at the same time, though they can set each other off. The Native Americans knew this having observed them for at least 20,000 plus years and a local West Coast saying is: "When Grandfather speaks Little Sister's Answer."

Usually, Grandfather is Lassen, but the point is if Lassen (or in some cases Shasta) erupts, the other "sisters" will erupt afterward (or some of them will).

Even a minor eruption similar to La Palma would devastate the area with smoke, ash and dangerous chemicals. It would obscure roads and disrupt air traffic. Imagine that going on for months.

 

[Samuel Adams]

*wakes up......stretches arms out above head and......*

YAAAAAWWWWWWWWWNNNNNS


mmm.....g’mornin’ everybody.





Oh.

What’s this, aNUTHER boring old sleepy volcanic nothingburger ?

Have fun with that.



*grabs his Teddy Bear and falls back to sleep*

 

[CaryC]

*wakes up......stretches arms out above head and......*

YAAAAAWWWWWWWWWNNNNNS


mmm.....g’mornin’ everybody.





Oh.

What’s this, aNUTHER boring old sleepy volcanic nothingburger ?

Have fun with that.



*grabs his Teddy Bear and falls back to sleep*

Dude you've got to be more engaged. This is basically a secondary doom porn site. So you could do at least a single before you go back to sleep.

Come on man!

 

[ShadowMan]

The bottom line is that there's nothing we can do about it IF one of these "dormant" volcanoes decides to wake up and get our attention, and if one of these calderas goes nuclear, well.....it's game over for the locals and anyone within a couple of hundred miles or more, as well as it's going to be one helva mess to clean up. Fortunately it's usually a long time between major eruptions in human time. Not so much in geologic time.

Had a Filipino friend of mine in the navy that was planning on retiring back in the Philippines....until Mount Pinatubo buried his retirement home and farm under twenty plus feet of ash. He showed me the before and after pic's. Very nice two story concrete typhoon proof house.....didn't fair so well with the volcano. You could just make out the peak of the second story roof through the ash field that was as far as you could see. So I guess now he has a two story basement to build upon.

 

[summerthyme]

I think I have a greater chance of dying from an infected hangnail than from a Long Valley eruption. Still awaiting Wormwood.

We knew a man who did just that! Went septic, and killed him within 48 hours...

Summerthyme

 

[cleobc]

A couple of fun features in the neighborhood not that far from Long Valley Caldera are Aurora Crater and Mud Springs Volcano. You can google them. I've always wanted to drive down there and look at them but haven't ever gotten around to it.

 

[Groucho]

6-months. It's gonna let go in 6-months, I tell ya.

 

[SpokaneMan]

Let it blow, let it blow, let it blow.

Why? So innocent people can die a horrible death?

 

[dioptase]

I cringe to even think about a major eruption there. For sure it would cut off Hwy 395, which is the N-S highway on the east side of the Sierra. Bye-bye Mammoth Lakes, and there goes half the state under ash, including large agricultural areas. Apart from the cities, people, farmland, and ranches, there go two or more national parks under the ash too. (Yosemite is very close by, but per that map it might mostly escape.) Also Lake Crowley, a major water source for LA, will be under the ash.

 

[Pinecone]

We knew a man who did just that! Went septic, and killed him within 48 hours...

Summerthyme

That qualifies for doom.

 

[Doc1]

I think the amount of ash deposited would depend largely on wind direction. Irrespective of where it was deposited, heavy ash fall would preclude surface transportation. Street, highways and probably even railroads would be clogged and impassable. We are seeing that currently with the LaPalma eruption and, as these things go, LaPalma is a small eruption.

I don't think the entire US military has the resources to supply huge numbers of refugees/victims by air.

Best
Doc

 

[cyberiot]

I think the amount of ash deposited would depend largely on wind direction. Irrespective of where it was deposited, heavy ash fall would preclude surface transportation. Street, highways and probably even railroads would be clogged and impassable. We are seeing that currently with the LaPalma eruption and, as these things go, LaPalma is a small eruption.

I don't think the entire US military has the resources to supply huge numbers of refugees/victims by air.

Best
Doc

If the 2010 eruption of Iceland's Eyjaunpronounceable volcano is a a predictor, air traffic will be halted for a good long while as well.

 

[danielboon]

 

[danielboon]

 

[packyderms_wife]

View attachment 381711

what are we looking at here?

 

[TheSearcher]

If the 2010 eruption of Iceland's Eyjaunpronounceable volcano is a a predictor, air traffic will be halted for a good long while as well.

Eyefullajam

 

[TheSearcher]

what are we looking at here?

I second the query.

 

[danielboon]

what are we looking at here?

There are a bunch of earthquakes (small ones at Yellowstone)