The denser oceanic plate is subducting beneath the less dense continental plate offshore of British Columbia, Washington, Oregon and northern California. The North American Plate moves in a general southwest direction, overriding the oceanic plate. The Cascadia Subduction Zone is where the two plates meet.
Tectonic processes active in the Cascadia subduction zone region include accretion, subduction, deep earthquakes, and active volcanism of the Cascades. This volcanism has included such notable eruptions as Mount Mazama (Crater Lake) about 7,500 years ago, Mount Meager about 2,350 years ago, and Mount St. Helens in 1980. Major cities affected by a disturbance in this subduction zone would include Vancouver and Victoria, British Columbia; Seattle, Washington; and Portland, Oregon.
In geology, subduction is the process that takes place at convergent boundaries by which one tectonic plate moves under another tectonic plate and sinks into the mantle as the plates converge. Regions where this process occurs are known as subduction zones. Rates of subduction are typically centimetres per year, with the average rate of convergence being approximately two to eight centimetres per year.
Plates include both oceanic crust and continental crust. Stable subduction zones involve the oceanic lithosphere of one plate sliding beneath the continental lithosphere or oceanic lithosphere of another plate due to the higher density of the oceanic lithosphere. That is, the subducted lithosphere is always oceanic while the over-riding lithosphere may or may not be oceanic. Subduction zones are sites that have a high rate of volcanism, earthquakes, and mountain building.
Orogenesis, or mountain-building, occurs when large pieces of material on the subducting plate (such as island arcs) are pressed into the over-riding plate or when subhorizontal contraction occurs in the over-riding plate. These areas are subject to many earthquakes, which are caused by the interactions between the subducting slab and the mantle, the volcanoes, and (when applicable) the mountain-building related to island arc collisions.
Will the Cascadia Earthquake be the Worst Disaster North America’s Ever Seen? | Weathered
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The Cascadia Subduction Zone is a sleeping monster lurking just off the Northwest coast of the United States. It extends 600 miles between Northern California and Vancouver B.C. and experiences a massive megathrust earthquake every 250 years on average. The last one happened 321 years ago and scientists say there is a 30% chance we’ll see another in the next 50 years. It’s expected to rival the 9.0 quake that shook Japan for 6 minutes, which was the most destructive natural disaster in human history. It unleashed a tsunami that reached 100 feet in some areas, caused an estimated $360 billion in damages and claimed some 16,000 lives.
If this sounds ominou...
published: 15 Mar 2021
Cascadia: The Earthquake that will Destroy Westcoast America
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This video is #sponsored by Curiosity Stream.
Our sister channels:
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Credits:
Host - Simon Whistler
Author - Morris M.
Producer - Jennifer Da Silva
Executive Producer - Shell Harris
Business inquiries to [email protected]
Source/Further reading:
I...
published: 14 Jul 2020
The Next Cascadia Earthquake: Worst Case Scenario
More than 300 years ago, the Pacific Northwest was rocked by a magnitude 9.0 earthquake. What would happen if a similar earthquake hit the region today?
Resources:
https://www.dnr.wa.gov/programs-and-services/geology/geologic-hazards/emergency-preparedness
https://www.seattletimes.com/seattle-news/science/californias-celeb-quake-expert-says-preventing-damage-is-key-to-quick-recovery/
https://www.seattle.gov/emergency-management/prepare/prepare-yourself
Sources:
https://data.seattle.gov/Permitting/Unreinforced-Masonry-Buildings/54qs-2h7f
https://www.oregon.gov/oem/documents/oregon_resilience_plan_final.pdf
https://www.oregon.gov/oem/Documents/Cascadia_Rising_Exercise_Scenario.pdf
https://www.oregon.gov/ODOT/Bridge/Docs_Seismic/Seismic-Plus-Report_2014.pdf
https://www.crhnet.ca/stud...
published: 19 Dec 2018
What is the Cascadia Subduction Zone?
This video is a summary of the research and eventual reality that inspired me to write the Cascadia Fallen fiction series.
Thanks again for watching! Please leave me a comment or question below. Don’t forget to subscribe!
University of Washington M9 Project:
https://hazards.uw.edu/geology/m9/
Dr. Erin Wirth speech on Cascadia:
https://www.youtube.com/watch?v=EHCZoHTrr94
Sign up for my Newsletter here, where I run special giveaways:
https://www.cascadiafallen.com/contact/
GET the Cascadia Fallen Books (Paperback, Audible, or Kindle) HERE:
https://www.amazon.com/Austin-Chambers/e/B07SCTS2YY/ref=dp_byline_cont_ebooks_1
FOLLOW ME HERE:
Cascadia Fallen Facebook: https://www.facebook.com/cascadiafallen/?ref=bookmarks
Author Austin Chambers Facebook: https://www.facebook.com/authoraustinc...
published: 08 Apr 2020
Cascadia Subduction Zone: The Big One
Created by the Oregon State University IDEAS Visualization Team
published: 29 Jun 2016
New modeling offers a more precise picture of the Cascadia Subduction Zone
The model from OSU researchers shows subterranean fluid in the Cascadia Subduction Zone. It could help inform predictions about what would happen in an earthquake.
Read more:
https://www.kgw.com/article/tech/science/osu-researchers-3d-modeling-seismic-activity/283-77aaad30-29a5-4d31-90bf-4dd27ebeb7e7
Subscribe: https://www.youtube.com/c/KGWNews8
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published: 18 Jul 2022
What If The Big Earthquake Hits The Pacific Northwest Tomorrow?
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Off the coast of northern California, Oregon, Washington, and British Columbia sits the Cascadia Subduction Zone, a particular kind of fault line that will eventually unleash an earthquake not seen since the year 1700. When it does eventually hit, it's estimated to be the largest earthquake to ever strike the modern United States. Unfortunately, the Pacific Northwest has not prepared for such an incredibly devastating disaster. So what happens if it the big earthquake hits tomorrow?
Enjoy the video? Subscribe for more! https://www.youtube.com/channel/UC7-Z34pbJ0ZAOJRmUCEz0Cg
Source links:
...
published: 15 Jun 2022
Almost 10000 Tremor events along the Cascadia Subduction Zone this month.. Thursday 3/31/2022
Current World Earthquake Map https://earthquake.usgs.gov/earthquakes/map/
Recent California and Nevada Earthquakes http://scedc.caltech.edu/recent/
Current Space Weather info http://www.spaceweather.com/
Solarham.net
Live earthquake watch.
Live earthquake daily updates..
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateTerra.
↓ More info below ↓
The Cascadia Subduction ...
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateTerra.
↓ More info below ↓
The Cascadia Subduction Zone is a sleeping monster lurking just off the Northwest coast of the United States. It extends 600 miles between Northern California and Vancouver B.C. and experiences a massive megathrust earthquake every 250 years on average. The last one happened 321 years ago and scientists say there is a 30% chance we’ll see another in the next 50 years. It’s expected to rival the 9.0 quake that shook Japan for 6 minutes, which was the most destructive natural disaster in human history. It unleashed a tsunami that reached 100 feet in some areas, caused an estimated $360 billion in damages and claimed some 16,000 lives.
If this sounds ominous, that’s because it is. As catastrophic as the Tohoku quake was, Japan is light years ahead of the United States when it comes to earthquake preparedness. This grim reality has many experts very worried. And in this episode of Weathered we spoke with some of them about what we can expect when the “Big One” does hit, the kinds of work that need to be done to make our communities more resilient, and what you can do to keep yourself and your loved ones safe.
Weathered is a show hosted by meteorologist Maiya May and produced by Balance Media that helps explain the most common natural disasters, what causes them, how they’re changing, and what we can do to prepare.
Subscribe to PBS Terra so you never miss an episode! https://bit.ly/3mOfd77
And keep up with Weathered and PBS Terra on:
Facebook: https://www.facebook.com/PBSDigitalStudios
Twitter: https://twitter.com/pbsds
Instagram: https://www.instagram.com/pbsds
Thank you to Margaret A. Cargill Philanthropies for supporting PBS.
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateTerra.
↓ More info below ↓
The Cascadia Subduction Zone is a sleeping monster lurking just off the Northwest coast of the United States. It extends 600 miles between Northern California and Vancouver B.C. and experiences a massive megathrust earthquake every 250 years on average. The last one happened 321 years ago and scientists say there is a 30% chance we’ll see another in the next 50 years. It’s expected to rival the 9.0 quake that shook Japan for 6 minutes, which was the most destructive natural disaster in human history. It unleashed a tsunami that reached 100 feet in some areas, caused an estimated $360 billion in damages and claimed some 16,000 lives.
If this sounds ominous, that’s because it is. As catastrophic as the Tohoku quake was, Japan is light years ahead of the United States when it comes to earthquake preparedness. This grim reality has many experts very worried. And in this episode of Weathered we spoke with some of them about what we can expect when the “Big One” does hit, the kinds of work that need to be done to make our communities more resilient, and what you can do to keep yourself and your loved ones safe.
Weathered is a show hosted by meteorologist Maiya May and produced by Balance Media that helps explain the most common natural disasters, what causes them, how they’re changing, and what we can do to prepare.
Subscribe to PBS Terra so you never miss an episode! https://bit.ly/3mOfd77
And keep up with Weathered and PBS Terra on:
Facebook: https://www.facebook.com/PBSDigitalStudios
Twitter: https://twitter.com/pbsds
Instagram: https://www.instagram.com/pbsds
Thank you to Margaret A. Cargill Philanthropies for supporting PBS.
Go to http://go.thoughtleaders.io/1895720200714 for unlimited access to the world’s top documentaries and nonfiction series, and for our listeners, enter the p...
Go to http://go.thoughtleaders.io/1895720200714 for unlimited access to the world’s top documentaries and nonfiction series, and for our listeners, enter the promo code GEOGRAPHICS when prompted during the signup process and your membership is completely free for the first 30 days.
→ Subscribe for new videos two times per week.
https://www.youtube.com/channel/UCHKRfxkMTqiiv4pF99qGKIw?sub_confirmation=1
This video is #sponsored by Curiosity Stream.
Our sister channels:
Biographics - https://www.youtube.com/channel/UClnDI2sdehVm1zm_LmUHsjQ
TopTenz - https://www.youtube.com/channel/UCQ-hpFPF4nOKoKPEAZM_THw/
Credits:
Host - Simon Whistler
Author - Morris M.
Producer - Jennifer Da Silva
Executive Producer - Shell Harris
Business inquiries to [email protected]
Source/Further reading:
In-depth feature from the New Yorker: https://www.newyorker.com/magazine/2015/07/20/the-really-big-one
Detailed piece from Scientific American: https://www.scientificamerican.com/article/where-the-pacific-northwest-rsquo-s-ldquo-big-one-rdquo-is-more-likely-to-strike/
The mythology of the 1700 quake: https://blogs.scientificamerican.com/rosetta-stones/thunderbird-and-the-orphan-tsunami-cascadia-1700/
More on the mythology - excellent examples: https://slate.com/technology/2015/09/earthquakes-and-tsunamis-in-the-pacific-northwest-native-american-myths-and-geoscience.html
Could Cascadia trigger the San Andreas fault? https://www.nwpb.org/2019/12/03/the-big-one-and-another-one-research-shows-cascadia-quakes-sometimes-trigger-san-andreas/
The science-y bit: https://earthquake.usgs.gov/data/crust/cascadia.php
Cascadia on a map: https://www.nwpb.org/wp-content/uploads/2017/12/THE-BIG-ONE.jpg
Go to http://go.thoughtleaders.io/1895720200714 for unlimited access to the world’s top documentaries and nonfiction series, and for our listeners, enter the promo code GEOGRAPHICS when prompted during the signup process and your membership is completely free for the first 30 days.
→ Subscribe for new videos two times per week.
https://www.youtube.com/channel/UCHKRfxkMTqiiv4pF99qGKIw?sub_confirmation=1
This video is #sponsored by Curiosity Stream.
Our sister channels:
Biographics - https://www.youtube.com/channel/UClnDI2sdehVm1zm_LmUHsjQ
TopTenz - https://www.youtube.com/channel/UCQ-hpFPF4nOKoKPEAZM_THw/
Credits:
Host - Simon Whistler
Author - Morris M.
Producer - Jennifer Da Silva
Executive Producer - Shell Harris
Business inquiries to [email protected]
Source/Further reading:
In-depth feature from the New Yorker: https://www.newyorker.com/magazine/2015/07/20/the-really-big-one
Detailed piece from Scientific American: https://www.scientificamerican.com/article/where-the-pacific-northwest-rsquo-s-ldquo-big-one-rdquo-is-more-likely-to-strike/
The mythology of the 1700 quake: https://blogs.scientificamerican.com/rosetta-stones/thunderbird-and-the-orphan-tsunami-cascadia-1700/
More on the mythology - excellent examples: https://slate.com/technology/2015/09/earthquakes-and-tsunamis-in-the-pacific-northwest-native-american-myths-and-geoscience.html
Could Cascadia trigger the San Andreas fault? https://www.nwpb.org/2019/12/03/the-big-one-and-another-one-research-shows-cascadia-quakes-sometimes-trigger-san-andreas/
The science-y bit: https://earthquake.usgs.gov/data/crust/cascadia.php
Cascadia on a map: https://www.nwpb.org/wp-content/uploads/2017/12/THE-BIG-ONE.jpg
More than 300 years ago, the Pacific Northwest was rocked by a magnitude 9.0 earthquake. What would happen if a similar earthquake hit the region today?
Resour...
More than 300 years ago, the Pacific Northwest was rocked by a magnitude 9.0 earthquake. What would happen if a similar earthquake hit the region today?
Resources:
https://www.dnr.wa.gov/programs-and-services/geology/geologic-hazards/emergency-preparedness
https://www.seattletimes.com/seattle-news/science/californias-celeb-quake-expert-says-preventing-damage-is-key-to-quick-recovery/
https://www.seattle.gov/emergency-management/prepare/prepare-yourself
Sources:
https://data.seattle.gov/Permitting/Unreinforced-Masonry-Buildings/54qs-2h7f
https://www.oregon.gov/oem/documents/oregon_resilience_plan_final.pdf
https://www.oregon.gov/oem/Documents/Cascadia_Rising_Exercise_Scenario.pdf
https://www.oregon.gov/ODOT/Bridge/Docs_Seismic/Seismic-Plus-Report_2014.pdf
https://www.crhnet.ca/study-impact-and-insurance-and-economic-cost-major-earthquake-british-columbia-and-ontarioqu%C3%A9bec
https://www.youtube.com/watch?v=O8kxOX6w4w4
https://www.oregon.gov/oem/Documents/01_ORP_Cascadia.pdf
http://ibis.geog.ubc.ca/courses/geob370/students/class11/ljelisha/www/EQ_Plan.pdf
More than 300 years ago, the Pacific Northwest was rocked by a magnitude 9.0 earthquake. What would happen if a similar earthquake hit the region today?
Resources:
https://www.dnr.wa.gov/programs-and-services/geology/geologic-hazards/emergency-preparedness
https://www.seattletimes.com/seattle-news/science/californias-celeb-quake-expert-says-preventing-damage-is-key-to-quick-recovery/
https://www.seattle.gov/emergency-management/prepare/prepare-yourself
Sources:
https://data.seattle.gov/Permitting/Unreinforced-Masonry-Buildings/54qs-2h7f
https://www.oregon.gov/oem/documents/oregon_resilience_plan_final.pdf
https://www.oregon.gov/oem/Documents/Cascadia_Rising_Exercise_Scenario.pdf
https://www.oregon.gov/ODOT/Bridge/Docs_Seismic/Seismic-Plus-Report_2014.pdf
https://www.crhnet.ca/study-impact-and-insurance-and-economic-cost-major-earthquake-british-columbia-and-ontarioqu%C3%A9bec
https://www.youtube.com/watch?v=O8kxOX6w4w4
https://www.oregon.gov/oem/Documents/01_ORP_Cascadia.pdf
http://ibis.geog.ubc.ca/courses/geob370/students/class11/ljelisha/www/EQ_Plan.pdf
This video is a summary of the research and eventual reality that inspired me to write the Cascadia Fallen fiction series.
Thanks again for watching! Please le...
This video is a summary of the research and eventual reality that inspired me to write the Cascadia Fallen fiction series.
Thanks again for watching! Please leave me a comment or question below. Don’t forget to subscribe!
University of Washington M9 Project:
https://hazards.uw.edu/geology/m9/
Dr. Erin Wirth speech on Cascadia:
https://www.youtube.com/watch?v=EHCZoHTrr94
Sign up for my Newsletter here, where I run special giveaways:
https://www.cascadiafallen.com/contact/
GET the Cascadia Fallen Books (Paperback, Audible, or Kindle) HERE:
https://www.amazon.com/Austin-Chambers/e/B07SCTS2YY/ref=dp_byline_cont_ebooks_1
FOLLOW ME HERE:
Cascadia Fallen Facebook: https://www.facebook.com/cascadiafallen/?ref=bookmarks
Author Austin Chambers Facebook: https://www.facebook.com/authoraustinchambers/?modal=admin_todo_tour
Instagram: https://www.instagram.com/authoraustinchambers/
My Website & BLOG: https://www.cascadiafallen.com/blog/
Lawyerly stuff: This video description contains a link or links to Amazon. Shopping through it will earn me a tiny commission while costing you nothin’ extra. This will help support the channel—nickels add up! I much appreciate it!
My Video Gear:
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A Plain Ol’ iPhone 8…
#security #cascadia #cascadiasubductiozone
#cascadianpreparedness #cascadiafallen #slaughterpenposse #ourdutyistobeready
This video is a summary of the research and eventual reality that inspired me to write the Cascadia Fallen fiction series.
Thanks again for watching! Please leave me a comment or question below. Don’t forget to subscribe!
University of Washington M9 Project:
https://hazards.uw.edu/geology/m9/
Dr. Erin Wirth speech on Cascadia:
https://www.youtube.com/watch?v=EHCZoHTrr94
Sign up for my Newsletter here, where I run special giveaways:
https://www.cascadiafallen.com/contact/
GET the Cascadia Fallen Books (Paperback, Audible, or Kindle) HERE:
https://www.amazon.com/Austin-Chambers/e/B07SCTS2YY/ref=dp_byline_cont_ebooks_1
FOLLOW ME HERE:
Cascadia Fallen Facebook: https://www.facebook.com/cascadiafallen/?ref=bookmarks
Author Austin Chambers Facebook: https://www.facebook.com/authoraustinchambers/?modal=admin_todo_tour
Instagram: https://www.instagram.com/authoraustinchambers/
My Website & BLOG: https://www.cascadiafallen.com/blog/
Lawyerly stuff: This video description contains a link or links to Amazon. Shopping through it will earn me a tiny commission while costing you nothin’ extra. This will help support the channel—nickels add up! I much appreciate it!
My Video Gear:
Akaso EK7000 Pro 4K Camera: https://amzn.to/2Ja5VQd
Yongnuo YN300 Light: https://amzn.to/2UkgMNT
Lightweight Tripod: https://amzn.to/2WIeTvO
Rode Compact Phone Mic: https://amzn.to/2UFWJZg
Ubeesize Tripod S: https://amzn.to/2wqX8GU
A Plain Ol’ iPhone 8…
#security #cascadia #cascadiasubductiozone
#cascadianpreparedness #cascadiafallen #slaughterpenposse #ourdutyistobeready
The model from OSU researchers shows subterranean fluid in the Cascadia Subduction Zone. It could help inform predictions about what would happen in an earthqua...
The model from OSU researchers shows subterranean fluid in the Cascadia Subduction Zone. It could help inform predictions about what would happen in an earthquake.
Read more:
https://www.kgw.com/article/tech/science/osu-researchers-3d-modeling-seismic-activity/283-77aaad30-29a5-4d31-90bf-4dd27ebeb7e7
Subscribe: https://www.youtube.com/c/KGWNews8
Watch the latest KGW newscast: https://www.kgw.com/watch
Get the KGW app: https://kgw.com/appredirect
The model from OSU researchers shows subterranean fluid in the Cascadia Subduction Zone. It could help inform predictions about what would happen in an earthquake.
Read more:
https://www.kgw.com/article/tech/science/osu-researchers-3d-modeling-seismic-activity/283-77aaad30-29a5-4d31-90bf-4dd27ebeb7e7
Subscribe: https://www.youtube.com/c/KGWNews8
Watch the latest KGW newscast: https://www.kgw.com/watch
Get the KGW app: https://kgw.com/appredirect
Follow me on Substack: https://geographybygeoff.substack.com/
Follow me on Instagram: https://www.instagram.com/geographic_geoff/
Listen to the podcast: https:/...
Follow me on Substack: https://geographybygeoff.substack.com/
Follow me on Instagram: https://www.instagram.com/geographic_geoff/
Listen to the podcast: https://www.spreaker.com/show/what-if-geography
Off the coast of northern California, Oregon, Washington, and British Columbia sits the Cascadia Subduction Zone, a particular kind of fault line that will eventually unleash an earthquake not seen since the year 1700. When it does eventually hit, it's estimated to be the largest earthquake to ever strike the modern United States. Unfortunately, the Pacific Northwest has not prepared for such an incredibly devastating disaster. So what happens if it the big earthquake hits tomorrow?
Enjoy the video? Subscribe for more! https://www.youtube.com/channel/UC7-Z34pbJ0ZAOJRmUCEz0Cg
Source links:
https://www.newyorker.com/magazine/2015/07/20/the-really-big-one
https://en.wikipedia.org/wiki/1700_Cascadia_earthquake
https://en.wikipedia.org/wiki/Cascadia_subduction_zone
https://en.wikipedia.org/wiki/2004_Indian_Ocean_earthquake_and_tsunami#Tsunami
Photos and videos come from Pexels, Pixabay. Attribution below:
Andrey Kirievskiy
Chait Goli
CityXcape
Dean Diemert
Everett Bumstead
Evgenia Kirpichnikova
FEMA
Florian Delee
Kelly L
Kickstarter
Marcus Morosan
Mart Production
Meysa Soheili
Rodnae Productions
Roman Odintsov
Ruvim Miksanksiy
Stephen Pierce
Taryn Elliott
Tom Fisk
WeStarMoney
Wikimedia images are all public domain unless otherwise noted above.
Follow me on Substack: https://geographybygeoff.substack.com/
Follow me on Instagram: https://www.instagram.com/geographic_geoff/
Listen to the podcast: https://www.spreaker.com/show/what-if-geography
Off the coast of northern California, Oregon, Washington, and British Columbia sits the Cascadia Subduction Zone, a particular kind of fault line that will eventually unleash an earthquake not seen since the year 1700. When it does eventually hit, it's estimated to be the largest earthquake to ever strike the modern United States. Unfortunately, the Pacific Northwest has not prepared for such an incredibly devastating disaster. So what happens if it the big earthquake hits tomorrow?
Enjoy the video? Subscribe for more! https://www.youtube.com/channel/UC7-Z34pbJ0ZAOJRmUCEz0Cg
Source links:
https://www.newyorker.com/magazine/2015/07/20/the-really-big-one
https://en.wikipedia.org/wiki/1700_Cascadia_earthquake
https://en.wikipedia.org/wiki/Cascadia_subduction_zone
https://en.wikipedia.org/wiki/2004_Indian_Ocean_earthquake_and_tsunami#Tsunami
Photos and videos come from Pexels, Pixabay. Attribution below:
Andrey Kirievskiy
Chait Goli
CityXcape
Dean Diemert
Everett Bumstead
Evgenia Kirpichnikova
FEMA
Florian Delee
Kelly L
Kickstarter
Marcus Morosan
Mart Production
Meysa Soheili
Rodnae Productions
Roman Odintsov
Ruvim Miksanksiy
Stephen Pierce
Taryn Elliott
Tom Fisk
WeStarMoney
Wikimedia images are all public domain unless otherwise noted above.
Current World Earthquake Map https://earthquake.usgs.gov/earthquakes/map/
Recent California and Nevada Earthquakes http://scedc.caltech.edu/recent/
Current Sp...
Current World Earthquake Map https://earthquake.usgs.gov/earthquakes/map/
Recent California and Nevada Earthquakes http://scedc.caltech.edu/recent/
Current Space Weather info http://www.spaceweather.com/
Solarham.net
Live earthquake watch.
Live earthquake daily updates..
Current World Earthquake Map https://earthquake.usgs.gov/earthquakes/map/
Recent California and Nevada Earthquakes http://scedc.caltech.edu/recent/
Current Space Weather info http://www.spaceweather.com/
Solarham.net
Live earthquake watch.
Live earthquake daily updates..
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateTerra.
↓ More info below ↓
The Cascadia Subduction Zone is a sleeping monster lurking just off the Northwest coast of the United States. It extends 600 miles between Northern California and Vancouver B.C. and experiences a massive megathrust earthquake every 250 years on average. The last one happened 321 years ago and scientists say there is a 30% chance we’ll see another in the next 50 years. It’s expected to rival the 9.0 quake that shook Japan for 6 minutes, which was the most destructive natural disaster in human history. It unleashed a tsunami that reached 100 feet in some areas, caused an estimated $360 billion in damages and claimed some 16,000 lives.
If this sounds ominous, that’s because it is. As catastrophic as the Tohoku quake was, Japan is light years ahead of the United States when it comes to earthquake preparedness. This grim reality has many experts very worried. And in this episode of Weathered we spoke with some of them about what we can expect when the “Big One” does hit, the kinds of work that need to be done to make our communities more resilient, and what you can do to keep yourself and your loved ones safe.
Weathered is a show hosted by meteorologist Maiya May and produced by Balance Media that helps explain the most common natural disasters, what causes them, how they’re changing, and what we can do to prepare.
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Source/Further reading:
In-depth feature from the New Yorker: https://www.newyorker.com/magazine/2015/07/20/the-really-big-one
Detailed piece from Scientific American: https://www.scientificamerican.com/article/where-the-pacific-northwest-rsquo-s-ldquo-big-one-rdquo-is-more-likely-to-strike/
The mythology of the 1700 quake: https://blogs.scientificamerican.com/rosetta-stones/thunderbird-and-the-orphan-tsunami-cascadia-1700/
More on the mythology - excellent examples: https://slate.com/technology/2015/09/earthquakes-and-tsunamis-in-the-pacific-northwest-native-american-myths-and-geoscience.html
Could Cascadia trigger the San Andreas fault? https://www.nwpb.org/2019/12/03/the-big-one-and-another-one-research-shows-cascadia-quakes-sometimes-trigger-san-andreas/
The science-y bit: https://earthquake.usgs.gov/data/crust/cascadia.php
Cascadia on a map: https://www.nwpb.org/wp-content/uploads/2017/12/THE-BIG-ONE.jpg
More than 300 years ago, the Pacific Northwest was rocked by a magnitude 9.0 earthquake. What would happen if a similar earthquake hit the region today?
Resources:
https://www.dnr.wa.gov/programs-and-services/geology/geologic-hazards/emergency-preparedness
https://www.seattletimes.com/seattle-news/science/californias-celeb-quake-expert-says-preventing-damage-is-key-to-quick-recovery/
https://www.seattle.gov/emergency-management/prepare/prepare-yourself
Sources:
https://data.seattle.gov/Permitting/Unreinforced-Masonry-Buildings/54qs-2h7f
https://www.oregon.gov/oem/documents/oregon_resilience_plan_final.pdf
https://www.oregon.gov/oem/Documents/Cascadia_Rising_Exercise_Scenario.pdf
https://www.oregon.gov/ODOT/Bridge/Docs_Seismic/Seismic-Plus-Report_2014.pdf
https://www.crhnet.ca/study-impact-and-insurance-and-economic-cost-major-earthquake-british-columbia-and-ontarioqu%C3%A9bec
https://www.youtube.com/watch?v=O8kxOX6w4w4
https://www.oregon.gov/oem/Documents/01_ORP_Cascadia.pdf
http://ibis.geog.ubc.ca/courses/geob370/students/class11/ljelisha/www/EQ_Plan.pdf
This video is a summary of the research and eventual reality that inspired me to write the Cascadia Fallen fiction series.
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University of Washington M9 Project:
https://hazards.uw.edu/geology/m9/
Dr. Erin Wirth speech on Cascadia:
https://www.youtube.com/watch?v=EHCZoHTrr94
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#security #cascadia #cascadiasubductiozone
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The model from OSU researchers shows subterranean fluid in the Cascadia Subduction Zone. It could help inform predictions about what would happen in an earthquake.
Read more:
https://www.kgw.com/article/tech/science/osu-researchers-3d-modeling-seismic-activity/283-77aaad30-29a5-4d31-90bf-4dd27ebeb7e7
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Off the coast of northern California, Oregon, Washington, and British Columbia sits the Cascadia Subduction Zone, a particular kind of fault line that will eventually unleash an earthquake not seen since the year 1700. When it does eventually hit, it's estimated to be the largest earthquake to ever strike the modern United States. Unfortunately, the Pacific Northwest has not prepared for such an incredibly devastating disaster. So what happens if it the big earthquake hits tomorrow?
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Source links:
https://www.newyorker.com/magazine/2015/07/20/the-really-big-one
https://en.wikipedia.org/wiki/1700_Cascadia_earthquake
https://en.wikipedia.org/wiki/Cascadia_subduction_zone
https://en.wikipedia.org/wiki/2004_Indian_Ocean_earthquake_and_tsunami#Tsunami
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Current World Earthquake Map https://earthquake.usgs.gov/earthquakes/map/
Recent California and Nevada Earthquakes http://scedc.caltech.edu/recent/
Current Space Weather info http://www.spaceweather.com/
Solarham.net
Live earthquake watch.
Live earthquake daily updates..
The denser oceanic plate is subducting beneath the less dense continental plate offshore of British Columbia, Washington, Oregon and northern California. The North American Plate moves in a general southwest direction, overriding the oceanic plate. The Cascadia Subduction Zone is where the two plates meet.
Tectonic processes active in the Cascadia subduction zone region include accretion, subduction, deep earthquakes, and active volcanism of the Cascades. This volcanism has included such notable eruptions as Mount Mazama (Crater Lake) about 7,500 years ago, Mount Meager about 2,350 years ago, and Mount St. Helens in 1980. Major cities affected by a disturbance in this subduction zone would include Vancouver and Victoria, British Columbia; Seattle, Washington; and Portland, Oregon.
tsunamis ...The PacificNorthwest lies on top of a major subduction zone, with fault lines running under Seattle and Kitsap County ... The plan also evaluates possible effects of a tsunami caused by the Cascadia Subduction Zone.
A nightmare scenario for Northern California, as well as Oregon and Washington, would be a magnitude 9 earthquake along the Cascadia subduction zone off the coast ... If you’re uphill or inland from the zones, you should be safe from tsunamis.
However, some scientists predict the area might be overdue for a massive quake, and resulting tsunami, in the Cascadia Subduction Zone, an 1,100 km offshore fault that runs from northern California to ...
At a magnitude 9, it’s been predicted the eruption of the Cascadia Subduction Zone – a so-called megaquake – could kill 14,000 people and severely damage or destroy a million buildings.
It’s called the Mendocino Fault and is considered part of the Cascadia subduction zone that extends farther north along the coast ... It occurred in what is called a subduction zone where one of the Earth’s tectonic plates slid beneath another.
Thursday's tsunami close call serves as a reminder to consider "the big one" that could result from the Cascadia Subduction Zone, Rizzo said ... "In Cascadia, there is going to be no tsunami warnings going out.
Why so much confusion about the location and magnitude? Earthquake location is straightforward on land when seismic stations surround potential earthquake zones ... For our area, that’s a magnitude 9 on the Cascadia subduction zone.
Thursday’s quake was on a strike-slip fault but was near the south end of the Cascadia Subduction Zone, an area that in past centuries has generated massive earthquakes and tsunamis that sent water miles inland.
The Stranger's morning news roundup. by NathalieGraham... The most bone-chilling part of the tremors is how close the epicenter was to the Cascadia Subduction Zone ... ... Seeing how close this was to hitting the Cascadia fault is quite something ... .
It is where three tectonic plates meet and the Northwest’s Cascadia subduction zone and California’sSan Andreas Fault system meet ... subduction zone and the southern San Andreas Fault system meet.
San Francisco... But the temblor and a swarm of aftershocks served as potent reminders of the region's seismic danger ... Tsunami warning ... Thursday's earthquake occurred along an active plate boundary that's part of the larger Cascadia Subduction Zone ... .
'
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