During an eruption, if the wind is from the east at 10,000 feet (outflow), the tephra will fall on Vancouver, Canada in about an hour. This Page Hyperlinked [click on] Mount Baker Stratovolcano (background)© ™ ®/ Kulshan Stratovolcano© ™ ®, Simon Fraser University (foreground)© ™ ® ~ Image by Stan G. Webb - In Retirement© ™ ®, An Intelligent Grandfather's Guides© ™ ® next, The Man From Minto© ™ ® - A Prospector Who Knows His Rocks And Stuff© ™ ®
Learn more about the Cascadia Volcanic Arc© ™ ® (Part of Pacific Ring of Fire) Cascadia Volcanoes© ™ ® and the currently active Mount Meager Massif© ™ ®, part of the Cascadia Volcanic Arc© ™ ® [ash flow, debris flows, fumaroles and hot springs], just northwest of Pemberton and Whistler, Canada ~ My personal interest in the Mount Meager Massif© is that the last volcanic vent blew north, into the Bridge River Valley [The Bridge River Valley Community Association (BRVCA), [formerly Bridge River Valley Economic Development Society], near my hometown. I am the Man From Minto© ™ ® - A Prospector Who Knows His Rocks And Stuff© ™ ® The 2010 Mount Meager landslide was a large catastrophic debris avalanche that flowed to the south, into the Lillooet Valley British Columbia, Canada, on August 6 at 3:27 a.m. PDT (UTC-7). More than 45,000,000 m3 (1.6×109 cu ft) of debris slid down Mount Meager, temporarily blocking Meager Creek and destroying local bridges, roads and equipment. It was one of the largest landslides in Canadian history and one of over 20 landslides to have occurred from the Mount Meager massif in the last 10,000 years. Although voluminous, there were no fatalities caused by the event due in part to its remote and uninhabited location. The landslide was large enough to send seismic waves more than 2,000 km (1,200 mi) away into the neighboring U.S. states of Alaska and Washington and beyond. Multiple factors led to the slide: Mount Meager's weak slopes have left it in a constant state of instability. The massif has been a source of large volcanic debris flows for the last 8,000 years, many of which have reached several tens of kilometres downstream in the Lillooet River valley., to the south. It is arguably the most unstable mountain massif in Canada and may also be its most active landslide area. And on the north side lies Downton Lake Hydro Reservoir, impounded by the La Joi Dam, the uppermost of the Bridge River Project dams. The earliest identified Holocene landslide was in 7900 BP (before the present, or read it as the number of years ago). Further landslides occurred in 6250 BP, 5250 BP, 4400 BP, 2600 BP, 2400 BP, 2240. BP BP, 2170 BP, 1920 BP, 1860 BP, 870 BP, 800 BP, 630 BP, 370 BP, 210 BP, 150 BP and in 1931, 1947, 1972, 1975, 1984, 1986 and 1998. These events were attributed to structurally weak volcanic rocks, glacial unloading, recent explosive volcanism and glacial activity. Those who dance with earthquakes and volcanoes are considered mad by those who cannot smell the sulfur. We begin to deal with BIG (MEGA) EARTHQUAKES at Simon Fraser University (foreground) Kulshan Stratovolcano© / Mount Baker Stratovolcano (background)©New Cascadia Dawn© - Cascadia Rising - M9 to M10+, An Intelligent Grandfather's Guide© next, ~ Images by Stan G. Webb - In Retirement©, An Intelligent Grandfather's Guides©Countdown to Earthquake Drill - International Great ShakeOut Day is on Thursday, October 20, 2022 at 10:20AM, and annually on the 3rd Thursday in October thereafter - - I grew up in small towns and in the North where the rule is share and share alike. So, I'm a Creative Commons type of guy. Copy and paste ANY OF MY MATERIAL anywhere you want. Hyperlinks to your own Social Media are at the bottom of each post. Creative Commons License
This work is licensed under my Creative Commons Attribution 4.0 International License.

Thursday, May 25, 2017

Earthquakes, Tsunamis and Volcanoes: History and Stories of Survival, both Fiction and Non-Fiction

Not all hyperlinks on this page will work; some have since changed the underlying URLs.

 This is all very serious … a great Icelandic artist, Björk Guðmundsdóttir, has done a very visual representation (shown earlier in the blog/website): 
[https://cascadiamegaquake.blogspot.ca/2017/05/bjrk-mutual-core-official-art-music.html]

 Selected Bibliography, UPDATED TO:  May 25, 2017, and
Hyperlinked to the North Shore of Vancouver, BC's main libraries:

  • Article from The New Yorker - “When the Cascadia fault line ruptures, it could be our worst natural disaster in recorded history” ... READ IT “If, on that occasion, only the southern part of the Cascadia subduction zone gives way ... the magnitude of the resulting quake will be somewhere between 8.0 and 8.6. That’s the BIG ONE. If the entire zone gives way at once, an event that seismologists call a full-margin rupture, the magnitude will be somewhere between 8.7 and 9.2. That’s the VERY BIG ONE. Kenneth Murphy, when he was interviewed for the article, and who had directed FEMA’s (Federal Emergency Management Agency: FEMA.gov www.fema.gov/) - (Disaster mitigation, preparedness, response, recovery, education, and references.) Region X, the division responsible for Oregon, Washington, Idaho, and Alaska), says, “Our operating assumption is that everything west of Interstate 5 will be toast.” (The Editor of this note – SGW) adds that, in the CSZ - Cascadia Subduction Zone, the Juan de Fuca Plate continues all the way up to the Nootka Fault, midway up Vancouver Island's West Coast. There is another tectonic plate to the north, the Explorer Plate as well as the south, the Gorda Plate. The problem, you see, is that the land under our feet is NOT really “as firm as the ground we walk on”.
  • It is the North American Plate covering most of North America, Greenland, Bering Sea, Atlantic Ocean, Arctic Ocean. It starts in the east, at the Mid-Atlantic Ridge, and covers the area westward to the Chersky Range in eastern Siberia. The plate includes both continental and oceanic crust. It is moving inexorably to the west at between a speed of variously reported as 56–102 mm (2.2–4.0 in)/year, sometimes between 15-25 mm (0.59-0.98 in)/year, relative to the African Plate.  Recent GPS readings on the tops of the Olympic Mountains in Northwest Washington through to the Coast Range North West of Campbell River show that these mountains continue to be forced up, and over the Pacific Plate which is subducting beneath. The Pacific Plate  is 75,900,000 km2 (29,300,000 sq mi).  The CSZ - Cascadia Subduction Zone, the boundary between the North American Plate and the Pacific Plate, has been locked up for over 300 years.  If it breaks loose all at the same time, in a full margin rupture, at present the net deficit for the entire Pacific Northwest and Southwest B.C. is about down two meters (6.5 feet) and a jump 6.5 meters (21 feet) to the south-west.  In other words, the entire west coast will drop down two meters (6.5 feet) and lurch 6.5 meters (21 feet) to the south-west.  In each of many other Subduction Zone events in Alaska, Chile, Indonesia, Japan, Portugal these are all accompanied by megatsunamis.  The type of subduction zone great quake happens continuously over a period lasting for six (6) to fifteen (15) minutes.
  • Of special note: Cascadia's Fault The Deathly Earthquake That Will Devastate North America By Thompson, Jerry Book - 2011
  • The Pacific Plate is an oceanic tectonic plate that lies beneath the Pacific Ocean. At 103 million square kilometres (40,000,000 sq mi), it is the largest tectonic plate.
    Type Major
    Approx. Area 103,300,000 km2 (39,900,000 sq mi)[1]
    Movement1 north-west
    Speed1 56–102 mm (2.2–4.0 in)/year
North America, Greenland, Bering Sea, Atlantic Ocean, Arctic Ocean
1Relative to the African Plate
Type Major
Approx. Area 75,900,000 km2 (29,300,000 sq mi)[1]
Movement1 west
Speed1 15–25 mm (0.59–0.98 in)/year
CHILDREN'S SECTIONS:
OTHERS (eBooks that also have a printed copy may also be listed, above):
  1. Are You Ready? How to Prepare for An Earthquake By Mooney, Maggie eBook - 2011
  8. Walkabout DVD - 1998
  9. The World Is Moving Around Me A Memoir of the Haiti Earthquake By Laferrière, Dany
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