Three Sisters Volcano Update; Ongoing Magma Intrusion Composition Determined

The Three Sisters Volcano in Oregon is showing signs of unrest, as magma was confirmed to be moving underneath its edifice. This has pushed up the ground overlying the intrusion of magma, which is located approximately 3 miles west of the South Sister. We now know the composition of this magmatic intrusion, and this video will explain why this is important as it relates to what a future eruption, were one to ever occur, might look like. So, is an eruption likely? What is the context of this event? This video will answer these two questions, and discuss what might happen next at this volcano.
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Sources/Citations:
[1] U.S. Geological Survey
[2] Cascades Volcano Observatory
[3] Poland, M. P., Lisowski, M., Dzurisin, D., Kramer, R., McLay, M., and Pauk, B. (2017). Volcano geodesy in the cascade arc, United States. Bull. Volcanol. 79. doi:10.1007/s00445-017-1140-x
[4] Wicks, C.W., Dzurisin, D., Ingebritsen, S., Thatcher, W., Lu, Z. and Iverson, J. (2002). Magmatic activity beneath the quiescent Three Sisters volcanic center, central Oregon Cascade Range, USA. Geophysical Research Letters 29: doi: 10.1029/2001GL014205. issn: 0094-8276.
[5] Hawaiian Volcano Observatory
[6] KZbin Creative Commons, Link to the source video (used as several clips in the video this text appears underneath):
• ALONE (Senior Edition)... , CC BY 3.0
0:00 Three Sisters Volcano
0:29 Still Ongoing Magmatic Intrusion
1:45 Last 10,000 Years of Eruptions at Three Sisters
2:40 Magma Intrusion Composition
3:32 Current Situation
4:13 Conclusion

[@GeologyHub]

In my opinion, a volcanic eruption (for now, and probably the next decade) appears unlikely at the Three Sisters complex. Most magmatic intrusions never reach the surface, and this intrusion has been ongoing since 1995, not being all that remarkable.

[@alexdrockhound9497]

why do different types of lava/magma consistently have different temperatures? Is it just because of the source depth of the magma, or the water content or silica content affecting its melting point and thus buoyancy ? Or is there a more complicated thermodynamics answer to it? Maybe answering this question could make a good topic for a video?

[@paulmobleyscience]

Is this volcano silica rich?

[@squirrelcommander]

It’s interesting to note that the three sisters complex’s earthquake swarm in 2004 was the same year Mt St Helens started its minor eruptions until ending in i think 2008

[@paulmobleyscience]

@@alexdrockhound9497 That would be a good topic for a video. I would like to also add that a video on increasing cosmic rays increases the amount of muons that penetrate the planet and help to cause this magma intrusion to occur especially in silica rich magma.

[@alexdrockhound9497]

@@paulmobleyscience cosmic radiation also causes some interesting stuff with carbon dating.

[@ajhubbell3754]

I’m a commercial pilot that flies into Portland and then north and south from Mt. Shasta up to Seattle. There is a whole line of volcanos that you can see from the air. It actually starts at Mt. Lassen and moves north. It’s sometimes a bit freaky to think of what the full potential of that chain of volcanos is capable of.

[@snd3054]

I envy you! I've only seen Mt. Baker and Mt. Rainier in the distance, while flying in to Vancouver (as a passenger, often on the wrong side of the plane).

[@StuffandThings_]

You can also see it from good vantage points at Newberry, on the ground. You get a view of pretty much the entire Oregon section and then some, from Hood to Shasta on a clear day. The sharp, almost escarpment like topography on the eastern portion of the Oregon Cascades makes it very clear what geologic processes are going on, it must be one of the most obvious subduction arcs on the planet. Its a lovely view. And as a passenger, seeing Mount Rainier while flying by is always a treat.

[@GeologyHub]

Let us just hope that a volcano actively covered in glaciers (in the cascades) does not erupt in our lifetimes. Especially Rainier or Mount Baker. However I must admit how pretty all of them are. It is quite weird that Mount Jefferson for one is still active due to how eroded it appears. If you keep a close eye out north of three sisters you might see two flat topped subglacial volcanic vents known as tuyas

[@ajhubbell3754]

@@snd3054 the view from the cockpit is always better. I hate it when I have to fly in the back. I detest that little window.

[@dlane5292]

@@ajhubbell3754 Or no window, & just wall, but the paper shows as a window. Had that once it sucked!

[@StuffandThings_]

The Cascades are such a strange (and dare I say underrated) volcanic chain. Especially in the Oregon section, its a remarkably dense array of stratovolcanoes, cinder cones, spatter vents, fissures, and a hodgepodge of rhyolite, andesite, and basalt. From Newberry (which any American geology nerd absolutely _has_ to visit, its a geologic wonderland) you can see the entire Oregon Cascades on a clear day, which makes this quite obvious.

[@TB86000]

Plus - the area has the finest craft beer choices in the US that you can enjoy while gazing at those beautiful peaks. (No I don't work for Oregon tourism, I just can't contain my enthusiasm for our mountains.)

[@StuffandThings_]

@@TB86000 Well, lots of people seem to hold a lot of enthusiasm for the Cascades. They really are some stunning mountains. I personally don't drink, but I can vouch for the produce of the region. Eastern Washington produces the best peaches you will ever taste!

[@Tser]

Newberry Volcanic Monument is one of the most beautiful places in Oregon and one of my favorite places to visit in the world. The Big Obsidian Flow is mind boggling (and I suggest visiting it from the bottom, and also visiting Paulina Peak to look down on it). All of Oregon is a geologic wonderland, from the Lava Cast Forest, to the Gorge, Steens Mountain, a fault block mountain in the southeast, and the playa in its rain shadow, glacial erratics from the Missoula Floods, to the Painted Hills.... I'm a fan. XD

[@Tser]

@@StuffandThings_ There's a scenic railroad with a switchback still operating in the Columbia Gorge, and if you go at the right time of year, when you get to the top you have incredible views of some of the most iconic mountains... and all the locally grown cherries you could eat. Haha.

[@ironcladranchandforge7292]

​@@Tser-- The big obsidian flow is amazing! Been there numerous times including last fall.

[@pon2oon]

Amazing how many active/dormant volcanos there are in the continental US, and how infrequently they erupt.

[@ben4life988]

That's why most of all of them are referred as sleepy giants

[@Helezhelm]

Indeed and some are active enough that they have good chance of eruption in medium to long term future (meaning 100+ years in future at least), like Mt Helens, Rainier, Mt Baker, Mt Hood, Three Sisters, Newberry Caldera and Crater Lake.

[@ben4life988]

@@Helezhelm don't forget in California, Mt Shasta, Lassen peak, possibly long Valley caldera and mammoth mountain

[@Dragrath1]

Continental volcanoes do seem to erupt less frequently and in many cases the cause of the eruptions have been tricky to place with no universally agreed upon explanation to date. That said seismic tomography raises a pretty strong case that the zones of activity all lie along a significant and deep solid mantle discontinuity which otherwise corresponds pretty much exactly with the fast spreading ridge system of the East Pacific Rise and Juan de Fuca Ridge and lines up perfectly with the Basin and Range province with the Snake river plain to the Yellowstone hotspot where it sharply juts south marking the dividing point of the Colorado plateau and Rio Grande Rift. Effectively it maintains the typical mid ocean ridge structure of active rifts offset by transform faults structured like triple junctions with generally two active faults and since it extends so deep its probably going to stay active for a very long time. Thus I would expect the continental US to remain a hot spot of activity for many tens of millions of years. Oregon's interesting activity along the south eastern region of the cascades is pretty noteworthy as this deep transform junction cuts through the state between the sections in northern California and Idaho so this intrusion has a good chance of being at least partially derived from this apparent deep ridge structure. In fact based on Bob Hilderbrand's two episodes of the A to Z Baja BC controversy livestream series it looks like the current state of affairs has been more or less maintained at depth for the last ~50 million years as the North American Craton has gotten caught along a major kink in the EPR, with the Craton starting to fail under the upwelling heat and sheering strain around 17 million years ago with the section of Craton getting sheered off being the Colorado plateau. (I suspect this probably also explains the origin of the New Madrid Seismic zone as such weak points in the craton are likely channeling some of the underlying stress where the Colorado plateau is getting sheered off by relative plate motion elsewhere in the craton. If that model is accurate then when the plateau finally fails millions of years into the future there will probably be some pretty spectacular volcanism.

[@alexdrockhound9497]

@@ben4life988 you cant force me remember california exists.

[@allwinds3786]

Thank you for the update. Keep us in the loop.

[@oscarmedina1303]

Quite interesting. Thank you for the timely update.

[@brentcormier6775]

Please do a segment on the New Madrid Fault. It is significant and deserves attention. Thank you for all the education you bring to us.

[@Vladpryde]

I live in Sweet Home Oregon, so I appreciate you covering the Sisters, thank you.

[@WildernessRocks]

I vaguely remember this area while on my PCT thru hike in 2010. Learning about this is wild. Thank you.

[@MJLovesNature]

Given I just moved here recently, thank you for the heads up haha. I do love the geologic hot bed that is central Oregon though, I’d love to hear more about it!

[@Fusako8]

If you get a chance, visiting Madras or Prineville during their respective Rockhound events is tons of fun. Especially if Polkadot Agate Mine is doing an after dark dig.

[@thatidiot346]

​@@Fusako8 both of those cities are sitting on a 29.5 million year old supervolcano

[@DaniTheDeer]

​@@thatidiot346Ive lived here for 4 years now and just learned that fact last month! I thought the crooked river had carved out the large canyon upstream from Smith Rock, but it turns out its just a MASSIVE crater

[@EperogiLimousine]

@@DaniTheDeer caldera*

[@EperogiLimousine]

@@thatidiot346 I wouldn’t worry as 29.5 million years ago this land was likely under water (not to mention the GVP says anything that hasn’t had an eruption in 10000 years is dead)

[@yoboi691]

I suppose if a large enough basaltic intrusion happens, the remaining basalt could change chemistry melting local material in the chamber and that is what causes the Andasitic and Dacitic eruptions, but only if the intrusion is truly significant to leave enough behind to stay hot and eventually erupt later on as a secondary phase to large basaltic eruptions

[@nen.user.3764]

You have such a great channel . Thank you for your videos

[@jackmcmichael3560]

Thank you for the update

[@davidgrech4574]

Thank you for sharing your knowledge and expertise and I hope you know how much I appreciate your channel 👍🌎

[@gl15col]

The area looks like a great place to visit; so beautiful. On my bucket list now.

[@KimmyLaird23]

You like to live dangerously lol. I do too though...I want to visit before its landscape changes...that and the Grand Canyon too! I suppose we better start planning soon lol. Stay safe and Good luck!

[@StuffandThings_]

I would highly recommend Newberry (incredibly underrated!), Rainier, Baker, Hood, and although I haven't been yet, Indian Heaven. Its a beautiful region all around though, you can't really go wrong!

[@NatureShy]

One of my favorite places to hike and backpack. Quite beautiful. Volcanic scenery in Oregon is quite stunning and volcanoes in the PNW are usually the kinds of places I like to hike most.

[@donadams8345]

Make sure to make reservations. It's getting pretty busy because the number of tourists are increasing.

[@vixtex]

Thank you for this update 🌋

[@SCW1060]

Great info I've have been keeping an eye on Three Sisters for a long time

[@KathrynsWorldWildfireTracking]

3:58 - I'm a little concerned about lahars eventually destroying Belknap Hot Springs (resort.) Quite an amazing place, one of the few mountain resorts that survived the 2020 Wildfires. It's a real special place, go there if you can, while you can. Their outdoor swimming pool of hot spring water is amazing. (If you come in from the N, on the E side of the mountains...you have an amazing car ride tour of lava beds. Geologists dream.)

[@379exhd3406]

Thank you for your videos! Absolutely fascinating! Keep up the great work!

[@bebopshoobop]

I grew up in Bend and hiked south sister frequently. Awesome video!

[@T_Mo271]

Very interesting info about my local volcano.

[@markcantemail8018]

Thanks for the Video . We Hiked up to the Jade lake by the South Sister in July 1985 . Nice to see the Photo .

[@nsbd90now]

That was really interesting. Plus, beautiful landscapes.

[@santoast24]

I always love updates on my volcanos back home in Oregon and Washington. Love to see em. I just hope next time one of them does go boom Im there to partake in the momentous occasion

[@bjb7587]

Shoulda been there in 80. It was a blast. 🌋

[@skyybluu3118]

Great video thank you

[@barbaraflores3506]

Thank you for this information. I live in So. California. Always interested in, these thing's. As with, Yellowstone, too. Regarding volcano's, etc. Your presentation here, is easy to understand and very, professional!

[@Helezhelm]

Nice to see this volcano again as it's closest to my home, as Three Sisters is only fifty miles away from me. Have USGS determined how much magmatic volume is currently acclimating at four kilometers deep? Last time I heard, it was around few hundred million cubic meters worth of volume.

[@donadams8345]

You might want to be more specific as to which volcano the activity is closest to in the three Sisters complex. In this case it's the South Sister Volcano. There really isn't a "Three Sisters Volcano." It's a complex of 3 separate stratovolcanoes; South, Middle and North.

[@Wolfspirit50]

Fascinating!

[@KateColors]

Love watching and reading these comments. My son and his family live in Portland and I, on Cape Cod; so, it's good to know what's happening there. Everyone's comments though really makes this beach-lover want to explore OR!

[@colleenjeffries3334]

I visited Oregon many years ago with my husband, as we traveled through several of the western states. I remember this as a very beautiful state!

[@OdeeOz]

I visited those Volcanoes a couple times in 1963 with dad on a hunting trip, when we lived in Klamath Falls. Beautiful valleys surround them.

[@kd7alt]

I have hiked the PCT and sisters in that area multiple times. Beautiful area.

[@NightingaleSunset]

I thought North Sister was a shield volcano? I remember learning of little brother it's predecessor it was built on... Maybe I got it mixed up

[@missricka6801]

I find this of particular interest having a breathtaking view of the Three Sisters from my veranda.

[@kathrynronnenberg1688]

There are an unfortunate number of towns in the Pacific Northwest that are built on top of what we now recognize as old lahar flows, although until you showed that map, I didn't realize Sisters was one of them. The Newberry volcanic field in central Oregon is fascinating, too. Maybe that's worth a video?

[@ChrisRoberts000]

FYI, North Sister is a shield volcano, not a stratovolcano. Nevertheless, great explanation of Three Sisters volcanism.

[@artcurious807]

Where does the Chloride come from ? Why not more sulfur or S02 increases ? just curious.

[@tincup3773]

Good time to go camping there.😊

[@justalurkr]

Living just south of Portland, I'm glad to hear it! 😅

[@sotiredoflies]

Please explain the lava type chart you showed in this video?

[@johnnash5118]

You kept referring to these volcanoes as the Three Sisters “Volcano,” despite accurately describing them as three separate and distinct stratovolcanoes. They each have names- North Sister, Middle Sister and South Sister. They’re each distinct from the other in age, composition, mineralization, and each have their own magma chambers; therefore, they should be as distinguishable in name as well.

[@davidr.walters371]

And their names are faith hope n charity is south sister , beautiful I picked her to climb cause the biggest and a cool sowbowl on top n considered still active I'd say there were steaming fumaroles in the west side glacial remnants .yea central Oregon so beautiful guess it's getting time somewhere again .

[@philipmorgan5500]

What's the skinny on the Nevado del Ruiz volcano in Columbia?

[@julieelliott7450]

Would you have a weekly chat on all the volcanic activity on the fault lines weekly? Could you include earthquakes and rainfall for the areas as well. Thanks

[@maryglo1]

Dutchsince does weekly earthquake reports and also reports on volcanic activity around the world.

[@sonofjesus185]

How much is water from the spring thaw It always happens in Yellowstone at the same measurements that you're describing

[@PDXGal]

Please tell us more about Mount Hood, Mount Adams, and Mount Rainier. Also, please tell us about the Yellowstone Park area. Thank you!

[@mariekatherine5238]

What’s really freaky to a kid from the northeast USA is to be hiking along and suddenly there’s a steam vent beside the trail.

[@apismellifera1000]

What is chloride? that is showing up in streams around the volcano?

[@kdeuler]

Interesting! Thanks. I was just wondering: Is there a timing correlation between subduction earthquakes and eruptions of the subduction-caused volcanos?

[@nortyfiner]

Inconclusive, data lacking. We have only a handful of examples of possible correlation, the biggest being the 1960 Valdivia quake (the largest earthquake ever recorded) and an eruption of Cordon Caulle (located east across the width of Chile from the epicenter) that happened only two days later. Conversely, the majority of subduction related earthquakes do NOT seem to cause any possibly related volcanic activity. And in all cases, correlation in time does NOT mean causation, which at our present level of knowledge is impossible to prove. Being able to see underground and witness what happens down there is every geologist's dream, but until that technical breakthrough comes around, if it ever does, we can only look at events on the surface and speculate.

[@johnnash5118]

@@nortyfiner Hopefully seismic tomography resolution will progress to reveal the answers within our lifetime.

[@gabrielrekt]

Can someone explain Stone Mountain? GA

[@caroleknappsmith9010]

I live in Bend, Oregon. Just east of the Three Sisters Mountain Range. How can I get a copy of this story. I want to have my son read it, please. He lives in Bend as well. Thank you.

[@chasemclain6235]

Could there be a mix in lava at some point?

[@eagleeyeproductions2317]

I would love to see a video on the history of the magma hot spot that has travelled East from Oregon (Creating Leslie Gulch) all the way to it's current position below Yellowstone.

[@respectbossmon]

Is it possible that when an eruption eventually occurs, could the Three Sisters be joined by a Little Sister?

[@keithrosenberg5486]

How did they determine it is basaltic?

[@ThatOpalGuy]

great content in this video. I live in idaho, not so far away, and found this very informative. thanks again. also: are you glad to see me or is that a magmatic intrusion in your pants?

[@toddshreve]

I've climbed South Sister!

[@Jarl_Thidrandi]

If we ask the magma really nicely, do you think it might move up to Portland instead? There's nothing there we wouldn't be better off without.

[@GeoForge]

Before watching the video, I'm going to guess that it is a high viscous magma of dacite to rhyolitic composition due to the years of slow uplift. Edit: Well basaltic it is. I do wonder if it is interacting with dacite or rhyolitic magma at depth and maybe that is why its been slowly intruding into the crust? Thanks for the video and your explanation of what is happening.

[@elric_310]

I had the same thought, slow = viscous. But it could be a low influx intrusion even though it's basalt.

[@KimmyLaird23]

The detection of Helium 3 has got me a little concerned though.

[@christopherscott8822]

Hey there - can you cover the earthquake in Alberta that seems to have been caused by injecting tar sands wastewater into the ground?

[@maryglo1]

Lassen? What about the steam venting where an earthquake happened recently in eastern Southern California desert? Thank you! Interesting about the temperatures of basalt and rhyolite.

[@donquihote6023]

Litem up! Make it big. Portland needs some help.

[@therealzilch]

The Three Sisters are very large in my childhood in the fifties and sixties.

[@anthonyloconte7835]

Have the quakes shallowed at all since they were first observed.

[@cryptokids3760]

We also have the subduction zone which is suppose to be a way more powerful or dangerous fault than the San Andreas fault. When you head up hwy 22 towards the sisters, you get to see a huge area that is many feet thick with a black lava flow as you head up the pass

[@thatsbesidesthepoint1536]

Snowboarding and skiing is still great, really expensive, but great !

[@KimmyLaird23]

What about the detection of Helium 4 and more importantly Helium 3, which is extremely rare! Let's hear about that please 😉

[@terratrodder]

Great video as usual. I live on Whychus creek and we joke about the impending mud flow that will one day wipe us out, hoping it goes west instead. 😄

[@russellzauner]

is the chloride dangerous at all?

[@RapturereadyforJesus]

I live close to Redmond and at times I feel small tremors. It won’t be long before we see an eruption.

[@mistysowards7365]

What about the possibility of the intrusion mixing w and possibly activating more evolved mush magmas?

[@Helezhelm]

It depends on many factors, as magma composition changes over time, as it can take thousands of years to change Rock A Type to Rock B Type. For example, South Sister had twenty thousand year dormancy period before it erupted in 2,000 years ago in rhyolite to dacitic composition. So, if those magma intrusion to be mixed up into andesitic or rhyolite, the intrusion needs to stay in underground for thousands of years to make any change.

[@StuffandThings_]

iirc Lassen's last eruption involved stale old mush magmas becoming reactivated, so I suppose its possible. Probably too many unknowns to determine that though.

[@johnnash5118]

@@Helezhelm ​ Magma chambers aren’t necessarily coalescent structures, as bi-modal eruptions can occur from separate vents within the same eruption.

[@robertanthony312]

Any chance of taking Potland or Salem out?

[@shastina5493]

@GeologyHub Can you please do a video on the Cascadia Subduction Zone and its anticipated subduction and what the magnitude of damage and natural occurring events from it would be? Thank you!

[@kevincrosby1760]

Well, last Cascadia event was in 1700, and the tsunami traveled all the way across the Pacific and did extensive damage to parts of the Japanese coastline...

[@7hilladelphia]

12,000 yrs seems to have become a watchword. Thanks for news 🎉

[@RCRitterFPV]

So bad time to move to sisters?

[@lorrainedale6851]

Information please

[@Lyddiebits]

I remember when St. Helen's blew her top. When these mountains decide to go...YIKES.

[@mtlart]

IT SHOULD BE NOTED: There is currently a geothermal exploration company performing fracking at the base of the Newberry cone that lies due south nearby the Three Sisters that were discussed in this video. Fracking a volcano....what could go wrong?

[@erikvanvechten1289]

While I can understand the concern, the magma is much lower, geothermal power generation is created by harnessing the heated ground water through steam turbines. It's not like drilling into a water bottle, the scale and depth of the drilling would have to be massive to cause something like that to happen.

[@mtlart]

@@erikvanvechten1289 Ok. Can you please expound on the increase of earthquakes in Texas due to the activity of fracking and the disposal of its waste fluids? And how such results in Texas would differ from the same practice here. The practice of fracking has resulted in an increase in earthquakes in other areas (not to mention rendering the underground water toxic to humans), how could this not affect the stability of a dormant volcano and make it unstable?

[@erikvanvechten1289]

@mtlartist The reason for increased seismic activity from fracking is caused by water being pumped down to retrieve the oil/natural gas products. This added pressure and fluid can disturb faults and cause them to slip resulting in earthquakes. There usually aren't active volcanic systems near where oil/gas is being extracted. That being said just like geothermal power system drilling, even if there were, fracking would not be a big enough in both depth and scale to disturb a magma chamber. Geothermal power generation is a very "green" energy producing process recycling heated water from the earth. Simply put we're just not digging deep enough and to a large enough scale to ever make accidentally "popping the champagne cork" of a magmatic system.

[@donalddday7741]

lots of people live full time around the area and even more show up to camp and ski in the winter

[@mikemoffitt8645]

Is There The Technology to Detect Cooler Lava in 3 Sisters Volcanos, 2nd Question Could The 3 Sister Have Been Fourmed From a Caldera ?

[@proudchristian77]

As scary as that is , it's pretty too ! 🏝

[@celestemartin3407]

Where is Mount Saint Helen on the map?...

[@mbvoelker8448]

So, eventually we could see a nice tourist eruption?

[@TomLuTon]

If it is basaltic, and it does erupt with nothing downstream for miles, we'd have a tourist attraction and not a disaster zone. Might even make money for the area instead of costing money.

[@_MikeJon_]

Is it just me or does it seem like a lot of the mountains here in the PNW are starting to stir.

[@b3yourself91]

what are the chances a volcano erupts in the lower 48 in the next decade?

[@aaronfranklin324]

Is that a resurgent complex in a Caldera like the Okataina-Tarawera system, or a pre Supervolcano complex like Ruapehu-Ngarahoe-Tongariro ? Taupo, pre Oruanui being like the later now, and destined to be like Okataina-Tarawera in the future. A basalt intrusion, releasing levels of chloride approaching that of seawater in groundwaters, is NOT a good sign. That's a sign of high volatiles basalt intruding, that could do here... EXACTLY what Taupo did 26000 years ago in the Oruanui sequence. Which was initiated by exactly the same Basaltic recharge process.

[@aaronfranklin324]

Uh-oh. Bad News indeed. This is your next Yellowstone scale Supervolcano Gearing up to blow. It's definitely a pre Supervolcano complex in final sequence. You have an identical to Rotorua supervolcano circular central nippled 15mile caldera to the south only thirty miles.

[@mandipai]

Thank you! Where are the new hot springs? 😂

[@Mr.56Goldtop]

Too bad, I was hoping that it would take out Portland.

[@thesisypheanjournal1271]

So are we looking at Mt. St. Helens 2.0?

[@lauram9478]

❤

[@HelloitsmeTara]

Black Butte is habituated by a lot if Californians it would be interesting how fast the return to California if they heard this .

[@nonewherelistens1906]

My fear would be subsequent earthquake activity that would destabilize Cougar Dam.

[@technowarriorstv]

Hey btw our collaboration video on toba passed 1k views making it the most viewed let's Play Video in the channels history

[@Kongokongokongo]

Why dont they do this at Askja

[@cjnthn]

i have been by that volcano many times without knowing it was a volcano! lol

[@Tom-ic7hw]

is that mega mama country ?

[@kittygonzalez2827]

Clearlake volcanic field is extremely loaded with different silicates that produce differing Colors of Obsidian ....and of course the quartz crystals that make our “Moon Tears, aka .clearlake diamonds.

[@dlane5292]

I remember when I was kid back in the early 80's traveling with my Grandparents from Oroville to Fort Lewis where my Uncle was stationed living with his wife & 3 daughters. On the way up I would see these peaks, & I would ask what they were or if they had a name. Of those that they knew they would tell me the peaks, & mentioned those they knew were volcanoes.

[@Kristina-nr4hl]

Hope Faith Charity are the names of the three sisters mountains

[@patrickpierce8311]

Hopefully its just rolling over an going back to Sleep! Spent a few nights there. Walked the trails!