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.

Tuesday, February 10, 2015

Earthquake Warning - 2013 Episodic Tremor and Slip (ETS) - Earthquakes Canada 'Cascadia Subduction Zone'


Published on YouTube Jun 14, 2013
HD Chaotic Original:
Earthquake Warning for the Cascadia Subduction Zone Past!
Next chance follows the Episodic Tremor and Slip - Earthquakes Canada (ETS) Cycle (this is an Adobe .pdf file) of 14, 15.5, 14, 12.5, 14 months etc .etc. peaking around 2020-21.

 Here on the West Coast of Canada we have what's called an Episodic Tremor & Slip (ETS) that occurs on a fairly regular cycle every 14 months and lasts for 2 weeks. This is caused by the Juan De Fuca Plate Subducting under the North American Plate at a rate of roughly 2-5 cm (0.98 Inches)/year which pushes our mountains up approximately 3 mm (0.11811 inches) per year. However the Northern part of the Subduction Fault is locked and every ETS adds more pressure to the locked area. When this slips the North American Plate could move up to 10 to 20 Meters Seawards. Causing a Mega Thrust Earthquake of 9 or higher Magnitude. Due to the Periodicity of the Cycle of the ETS, this could occur at any time.

 Cascadia Subduction Zone:

The westerly boundary of the North American Plate is the Queen Charlotte Fault running offshore along the coast of Alaska and the Cascadia subduction zone to the north, the San Andreas Fault through California, the East Pacific Rise in the Gulf of California, and the Middle America Trench to the south.  West of Vancouver Island, and extending from the north tip of the Vancouver Island to northern California, the oceanic Juan de Fuca plate is moving towards North America at about 2-5 cm (0.98 Inches)/year. This region is called the Cascadia subduction zone. Here, the much smaller Juan de Fuca plate is sliding (subducting) beneath the North America continent.  It is about 45 km (27.96 Miles) beneath Victoria, and about 70 km (43.50 Miles) beneath Vancouver. The ocean plate is not always moving though.

There is good evidence that the Juan de Fuca and North America plates are currently locked together, causing strain to build up in the earth's crust. It is this squeezing of the crust that causes the 300 or so small earthquakes that are located in southwestern British Columbia each year, and the less-frequent (once per decade, on average, damaging crustal earthquakes (e.g., a magnitude 7.3 earthquake on central Vancouver Island in 1946). At some time in the future, these plates will snap loose, generating a huge offshore "subduction" earthquake - one similar to the 1964 M=9.2 Alaska earthquake [http://en.wikipedia.org/wiki/1964_Alaska_earthquake], or the 1960 M=9.5 Valdivia, Chile earthquake [http://en.wikipedia.org/wiki/1960_Valdivia_earthquake]. Current crustal deformation measurements in this area provide evidence for this model. Geological evidence also indicates that huge subduction earthquakes have struck this coast every 300-800 years.

 This last occurred on December 26, 1700 at 9:00pm.  Will it happen this Year?

Links:
Natural Resources Canada
http://www.earthquakescanada.nrcan.gc...
U.S.G.S.
http://www.usgs.gov/
Global News Canada -- Original
http://globalnews.ca/news/635222/b-c-...

List of 20th-century earthquakes
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