Seattle Earthquake Fault - Beneath Largest City in the Pacific Northwest
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- Опубликовано: 8 сен 2024
- More earthquakes in Seattle? A major fault runs beneath downtown Seattle. Faults are related to earthquakes and we have excellent evidence for a magnitude 7.0 or greater earthquake on the Seattle Fault 1100 years ago.
Alki Point, Restoration Point (Bainbridge Island) and tsunami evidence near Everett are all connected to the 900 A.D. Seattle Fault earthquake.
The 900 A.D. quake produced 21 feet of sudden uplift at some locations. The potential for that type of extreme ground shifting under our biggest city has scientists, engineers and emergency planners concerned.
What can you do to prepare? Be ready for one week of self-sufficiency in the event of a major earthquake.
For more information on Pacific Northwest earthquake preparedness - visit: www.emd.wa.gov/...
It's always good to understand your faults. You can't improve otherwise.
I'm a Cascadian! There are actually more than a dozen parallel fault lines running from the Cascade Mountains to the Cascade subduction zone from Portland, OR to Vancouver, BC.
+Mark Haushahn Mark, I agree if you're talking about other shallow crustal faults in the Puget Sound, although they cannot be traced out to the subduction zone.
Some can, but not all of them. When I was in High School in Port Angeles we studied them. My teacher was a geologist with the Park Rangers.
Me watching vids, trying to figure out what 2020 is gonna do next
The world has changed in the last month, and almost unrecognizable since New Years. Tectonic politics being one. The last quake was 1100 yeas ago. When was the one before that?
Answering in 2022, nm actually lol
I'm reading the City of Bellevue Emergency Water Supply Master Plan just released yesterday, which prompted me to look up Seattle Fault. For Bellevue, it seems it could be twice as bad as Cascadia, though half as likely. Like other sources it's advising 2 weeks or preparedness for individuals (which seems optimistic when reading the plan). So it's funny to hear you passing on the 2013 advise of 3 days (as I have done in the past). Emergency management is definitely getting better year by year, but also more realistic.
Assuming a Richter 6. That area hasn’t moved much while areas around it has. You quake could be bigger. In 1964 in Anchorage we had to self sustain weeks in our 9.2, and Seattle is large, better plan for longer terms of self sufficiency.
"You 'just' need to be prepared." Problem is that nobody has ever seen just how destructive an earthquake along the Juan de Fuca/Cascadia subduction zone can really be. We're used to thinking in terms of the piddling little earthquakes that California gets on the San Andreas fault. (The largest California earthquakes are in the magnitude 7 range. Magnitude 9 such as is possible in Washington, Oregon and Alaska is a whole different kettle of fish.) It is by far the most dangerous fault in North America, and also the one most likely to surprise people and catch them unprepared. In order to find a comparably dangerous fault zone you have to look at Japan, not elsewhere in the USA.
It's incredibly difficult to be prepared for an earthquake because they come with no warning. We can aware I think that's about as good as it gets. Of course you can have provisions stocked up and emergency plan for after the event
@@whocares1581 But if you're at work and you home is miles away, good luck getting to your stores.
Looks like you were standing at Jose Rizal park. I used to live a few blocks from there.
love your videos man! the i-90 one is a legendary video
Apparently, the tunnel is rated for a M 9.0. Let's hope so.
I've been doing tsunami coastal architectural design & town planning & saw that there is a dearth of research now being worked on mentioned in replies for dating previous tsunamis & correlating them.
Into the fray I want to point out that most oil & gas tank farms are not in tsunami-safe zones and will cause oil-on-water fires, thus without the results of this research one would be wise to move the tanks.
+Tom Mallard
Interesting. Thanks Tom.
Seattle buildings are the least seismic resistant design similar to bldg. in the midwest. They have tried to bring residential bldg. up to some standard.
This content is great, sad to see you don't post anymore!
Nick Zentner RUclips channel.
I know each person experiences the reality around them in slightly different ways, but I always had a bit of an issue with the concept of Faults as a way of describing geological structures. At least in some cases. To me it's a lot more illustrative if you describe Seattle to their non-scientific population as a city that is straddling over the edges of two moving blocks (which is basically the same thing a fault), but the focus in this concept is on the actual existing blocks and not some imaginary plane in between those blocks.
Thanks for watching, urawesomestperson. U R awesome.
wow, first time Ive heard this
Lots of new research here in Washington.
First time for me too and its 3 years later than when you found out. Why weren't we told...like in science class in first school.
Why does I90 follow the fault so closely? Coincidence? Did the fault produce a natural path for the highway to follow?
The earthquake was likely an 8 point or greater if it triggered a tsunami you need seafloor uplift. The other possibility is it triggered an underwater landslide. That wouldn't require a mega thrust earthquake.
Yes if there was a 20' sudden uplift We are talking about a Mega thrust earthquake most likely. Ive never heard of an earthquake causing uplift of the ground that was anything below an 8. Closer to a 9 point earthquake.
I just thought of something lol, Alaska had a 6.7? it was just shy of a 7 point earthquake, not too long ago. Not even a year ago, I think. That earthquake Massively distorted the land. So I may be wrong about the mega thrust being the only type of earthquake that can cause uplift. But I don't know if the Alaskan earthquake was uplift or if it was just buckling of the ground. I'm not sure if there's a difference lol lol. I guess this would depend on the geology of the area. I think the area of Alaska that was hit recently was near the same spot where the 1967 great quake occurred, Anchorage. There was severe buckling of the ground. 30' In some areas.
Seattle fault is a thrust fault -- the northern margin of a block of crust between this fault and the Tacoma fault, which has a dip slip angle about 35° in the opposite direction of the Seattle Fault. It's getting squeezed upward like toothpaste in a tube between the Canadian Coast Range Buttress and the Sierra and Oregon crustal blocks rotating northward. A MM7.1 is enough energy to cause a 21' rise along a fault only 30 or 40 miles long such as the Seattle Fault, especially given how relatively shallow the fault is.
Thanks Taylor.
The tunnel will be much more safe than the viaduct. None of the BART tunnels were damaged in the World Series Quake in SF.
Eyyyy hi Christifidelis buddies just watching here for the science module
The fault line runs right under my old high school in issaquah
Washington=the most interesting area in North America.
Just a 5% chance? Is that what I heard?
skyscrapers should be well based and built at angles and ive also suggested wayz to escape in case of problems inc emergency corner elevators etc
+Sean Newhouse Building codes have been upgraded based on these new earthquake discoveries, Sean. That's the good news. But like you, I wonder how the big ones will fare during the next Big One.
@@Ellensburg44 Up to what magnitude can buildings withstand with the new building codes?
Good point, Bill!
Have you got anything on the Coso Volcanic field in CA where those earthquakes are going on since July/04/2019 some people are thinking that the area is waking up what type of rock is there and if it does come to the surface what sort of volcanic event do you think it could be ?? I have seen many of your videos and like your work and knowledge on these things so thought you were the man to ask. Thank you.
Let's hope the engineers have done their homework, MegaTriumph!
Luckily the Space needle did not collaspe
Ha!
I guess we all have our little faults...
I simply cannot listen to his voice without thinking: Bill Clinton 😂
Great vids.
Thank you.
When the big one happens the ground will liquify. Quicksand.
Have A Nice Day!!!!!!!!!!!!!!!!!
Washington is faulting
Cascadia!
much more then 5% chance now.
Im scared
Don't be scared, Be prepared ;)
Be both! You need to be more than a little scared in order to be motivated enough to adequately prepare. Moving would be a good idea too.
I'd like to be in Seattle when an Earthquake happens, so I can actually tell people I've been in a natural disaster and lived lol...Last I was in Seattle I went to the top of the Space Needle it's amazing views up there but I would hate to be up there and see the needle fall with me inside oh dear there goes my life :/
Be careful what you wish for, Matt. Thanks for watching.
Well like I find earthquakes fascinating. Millions have been in them and I'd like to as well. We are overdue for one
How do you know you'd survive? Then of course there's the other side- you'd like it just so you can boast that you survive even though perhaps many other people would die? Strange...
Would Edmonds be effected by the tsunami
Mazen Mahmoud Yes, the last Seattle Fault quake produced a tsunami that surged in Puget Sound north at least to Everett. Sand deposit is the evidence. Found on many shores including south tip of Whidbey Island. This tsunami should not be confused with the much larger tsunami that hammered the west coast of Washington. Thanks.
+Mazen Mahmoud You won't have to worry living in Edmonds, unless you live right on the beach. It will flood a little no real tsunami. You will need to worry about the quake much more...
+Gurn Blanstein Disagree. Sand layers around the Puget Sound are currently being studied to learn of past tsunamis in the Sound. Many sand layers. Dates are being determined. To say "no real tsunami" in incorrect based on the deposits at Edmonds and other locations.
Not much for tall tsunami waves like the coastal areas will get, just a mega high tide with MUCH smaller waves and flooding from the tidal surge...
will it git to lakestevens?!
Jadyn Burgess Tsunami? No. Ground shaking? Yes. Thanks for watching.
Will Omak be affected
+Makya Matt Maybe a little shaking, but otherwise no. You live in a great area.
Hey. It's only life. Until it isn't.
So, the Sodo stadiums will fall into a giant crevice, with 70k sports fans. Buh-bye.
I like the intro song do you mind giving me the chords? interesting video
Pretty simple, MrRare. C7 - F - C7. I'm self-taught...but that's probably obvious. Thanks for the comment!
I live on Bainbridge island /: lol
12 11 21
i'm ok with the quake thing. But my nagging question is that is there anything in that pack Nick is wearing?
Skittles!
@@Ellensburg44 A 72 hour supply?
Meh, coupla smoke bombs, rabbit, a skeleton -- the usual stuff.
Just is quit but it's talk hot spots are fresher gear from now or three fault runs through St helons reawaking everett mount Spokane and Rockies this not sudden but more earth quake are hit as year goes by shur that pit Tacoma under see keaval direct as pound around it is ociean and foult river
online school go brr
they oughta start restructruing skyscrapers I still say they can do without these monstrosities
Seattle's high rise buildings are built similar to Tokyo's building tech.
Essentially they are on ball bearings. They move accordingly. When earthquakes happen.
@@JB-1138 Up to what magnitude can they withstand?
What's up with his accent.
He's from Wisconsin.