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Author Topic: The Cascadia Subduction Zone  (Read 25066 times)

Yowbarb

  • Guest
Re: The Cascadia Subduction Zone
« Reply #30 on: January 13, 2017, 12:25:56 AM »
I got an email from Global Moderator Ruth.

"....Note the swarm near Port Hardy, Canada. The latest is a 5.7, following a swarm of 4s.
This is on the fault line heading down the west coast."

Ruth
...

Yowbarb

  • Guest
Re: The Cascadia Subduction Zone
« Reply #31 on: January 17, 2017, 03:35:55 PM »
This 2.0 looks like it was located several miles south of Surrey. Not far from Bellingham.

"26.5 km ( 16.5 mi) WNW from Bellingham, WA"

https://www.pnsn.org/earthquakes/recent

Pacific Northwest Seismic Network

Magnitude:   2.0
Time(UTC):   2017/01/16 18:45:43
Time(Local):   2017/01/16 10:45:43 PST
Depth:   19.0Km (11.8miles)
Event Id:   61228952
Network:   UW

Yowbarb

  • Guest
Re: The Cascadia Subduction Zone
« Reply #32 on: May 02, 2017, 03:58:45 PM »
Today, Jimfarmer posted this quake in his Earthquakes General - 2017 Topic
« Reply #113

Mag. 6.3  in the far north-west corner of British Columbia, Canada (listed as Alaska) (USGS.  EMSC: 6.2).
...
https://www.pnsn.org/earthquakes/recent    Pacific Northwest Seismic Network

Yowbarb

  • Guest
Re: The Cascadia Subduction Zone
« Reply #33 on: May 13, 2017, 01:21:20 AM »
Quakes in the Cascadia Subduction Zone, from April 29th to May 13th, 2017
Map from the Pacific Northwest Seismic Network.
The largest was a 4.2, offshore.

Yowbarb

  • Guest
Re: The Cascadia Subduction Zone
« Reply #34 on: May 13, 2017, 11:38:12 PM »
Largest M4.4  May 13, 2017 Cascadia Subduction Zone, PNSN
...
https://pnsn.org/earthquakes/recent

Yowbarb

  • Guest
Re: The Cascadia Subduction Zone
« Reply #35 on: May 15, 2017, 06:02:54 PM »
Yowbarb Note: Scroll down a few paragraphs for April 14th article.
Screen shot: John Vidale shows an example of the ShakeAlert interface during a test warning. Photo credit: Kyla Marzewski.
...

https://pnsn.org/pnsn-data-products   

Pacific Northwest Seismic Network, data and products:

https://pnsn.org/pnsn-data-products/earthquake-early-warning

Earthquake Early Warning - (EEW)

Earthquake early warning (EEW) detects and measures earthquakes fast enough that warning can be given before the strongest shaking arrives, providing seconds to minutes to prepare.

Earthquake early warning is being implemented in many locations around the world.  The 2011 Tohuku Earthquake demonstrated some of its advantages.  The earthquake was recognized as serious within 30 seconds of its initiation offshore.  Tokyo residents had ~30 seconds warning of approaching strong ground motion.  Cell phone alarms warned millions of people when large aftershocks were likely to soon rattle them.

On the west coast of the the US, with USGS funding, Cal Tech and UC Berkeley have developed and are testing an early prototype EEW system known as ShakeAlert in California.  In November, 2012, the Moore Foundation announced awarded grants to Cal Tech, UC Berkeley, and the University of Washington to develop and begin testing this prototype system.  The USGS will help coordinate these activities. [continues]
...
NEWS: EEW in the News

PNSN announces launch of integrated West Coast Earthquake Early Warning System

April 14, 2017

by Shelley Chestler

On Monday morning (April 10) the Pacific Northwest Seismic Network (PNSN) was buzzing with activity, but not seismic activity. Network employees were sporting PNSN t-shirts and there were numerous outside officials wearing splashes of University of Washington purple. Reporters from The Seattle Times, KIRO News, the UW Office of News and Information, and more where crowded into the small lab room, surrounded by recording equipment. The lab room itself, with its old school, drum seismograms, was accessorized with extra monitors, a podium, and a clean, purple tablecloth covering the long table, normally cluttered with various earthquake demonstrations.

What was the occasion? The Seismic Network hosted a press conference to announce the rollout of a new version of the earthquake early warning (EEW) system, ShakeAlert, which is now fully integrated across the entire West Coast of the United States. Speakers included the Dean of the UW College of the Environment, Lisa Graumlich, Dave Applegate and Doug Given from the United States Geological Survey, U.S. Representative Derek Kilmer, Washington State Seismologist, John Vidale, Maximilian Dixon from the Washington State Emergency Management Division, and Dan Ervin, chair of RH2 Engineering.

Yowbarb

  • Guest
Re: The Cascadia Subduction Zone
« Reply #36 on: May 15, 2017, 06:07:58 PM »
Yowbarb Note: One point of this article,
There is not enough Federal government attention or funding to the problem of warning to citizens of the Pacific Northwest. There is still no Early warning system for residents in event of a Cascadia Subduction Zone quake...more funds needed. EEW prototype is developed.
...

https://pnsn.org/pnsn-data-products/earthquake-early-warning

EEW, PNSN announces launch of integrated West Coast Earthquake Early Warning System
April 14, 2017

[Article continues]
Previously the EEW system in the Pacific Northwest was detecting earthquakes and issuing warnings to a beta test group, but the warnings were not being utilized. Now, while the system is not yet ready to send alerts to the public, warnings issued to pilot users will be used to test earthquake response systems. Users include RH2 Engineering in Bothell, WA, which will use the alerts to secure municipal water and sewer systems, and the Eugene Water and Electricity Board in Oregon, where alerts will be used to lower canal water levels above a residential area and turn off turbines at a power plant.

While the release of the updated system marks a large step forward for West Coast earthquake early warning, there is still more work to be done to allow the system to reach its full potential. Both Applegate and Given emphasized that the system only has about half the funding needed in terms of annual support. The development of the system has so far been funded by a combination of public and private grants, including support from the Gordon and Betty Moore Foundation, Amazon Catalyst, and Puget Sound Energy.

“Federal investment in science matters,” said representative Derek Kilmer.

Kilmer believes that Monday’s press conference highlights the value of the EEW system. He hopes that Congress will realize the benefits of having an EEW system across the West Coast and respond. Additional funding will go towards installing new earthquake-recording stations, improving telecommunications between stations and network computers, continued testing of the system, and hiring new staff.

Currently, the system only includes 700 of the 1700 stations needed to cover all the hazards and populations on the West Coast. While the EEW system can move forward with the existing stations, earthquakes in some places, for example parts of Eastern Washington, will be detected less quickly than with the full station set or not at all. Unfortunately, installing new stations is not like “planting flowers” reported Given. Not only do new stations cost money, getting permits to put stations on private, state, and federally owned land is time consuming.

Another critical component needed to expand the system to be able to issue public alerts is education. Receiving a warning on your cellphone is not useful unless you know what the alert means and how to respond. While there is no funding for education yet, reported Dixon, the ultimate goal of EEW education is for the public to be able to react to warnings with a practiced, automatic response.

Despite the fact that a fully-fledged West Coast EEW system still requires more time, work, and funding, all the press conference speakers emphasized the utility of having earthquake warnings.

“(The earthquake risk on the West Coast) cannot be overstated,” stressed Given.

The EEW system will save lives, preserve infrastructure, and mitigate the loss of productivity post-quake. The release of the West Coast integrated system marks a milestone in earthquake preparedness.

Other articles about the West Coast early warning system:

“’ShakeAlert’ earthquake early warning system goes West Coast wide” – U.S. Geological Survey
“Earthquake early-warning system comes to Washington—but it’s not for the public yet” – The Seattle Times
“USGS, partners launch a unified, West Coast-wide earthquake early warning system” – UW Today
 

ShakeAlert earthquake warning system expands to Washington and Oregon, enters prototype testing

Yowbarb

  • Guest
Re: The Cascadia Subduction Zone
« Reply #37 on: June 06, 2017, 02:10:04 PM »
Note from Yowbarb: I am sort of surprised the Cascadia zone is pretty quiet...
Things could change in coming months... 3.1 the largest one recently.
...

https://pnsn.org/earthquakes/recent

Yowbarb

  • Guest
Re: The Cascadia Subduction Zone
« Reply #38 on: June 11, 2017, 10:32:12 PM »
The Magnitude picked up slightly. M4.8 on the 10th, posted in Pacific Northwest Seismic Network.
...

https://pnsn.org/earthquakes/recent

M 4.8 - 180km W of Port Hardy, Canada  2017-06-10 20:38:19 UTC 50.751°N   129.980°W 10.0 km depth

Yowbarb

  • Guest
Re: The Cascadia Subduction Zone
« Reply #39 on: June 15, 2017, 09:28:19 PM »
M3.6 near Seattle WA 855 PM PDT June 15, 2017  PNSN

https://pnsn.org/earthquakes/recent

Yowbarb

  • Guest
Re: The Cascadia Subduction Zone
« Reply #40 on: June 23, 2017, 02:05:14 PM »
Yowbarb Note -
In the screen shot the quake over to the left was a 4.8 on June 10th.
Screen shot:
M4.3 June 19, 2017 PNSN
...

https://pnsn.org/earthquakes/recent

Yowbarb

  • Guest
Re: The Cascadia Subduction Zone
« Reply #41 on: July 13, 2017, 10:54:01 AM »
Cascadia Subduction Zone - M4.1 quake, a long ways offshore from Eugene Oregon.
July 12, 2017 Pacific Northwest Seismic Network
...

https://pnsn.org/earthquakes/recent 

MadMax

  • Guest
Re: The Cascadia Subduction Zone
« Reply #42 on: July 13, 2017, 02:24:01 PM »
Experts 'Concerned' Because Long Valley Caldera Volcano Is 'Moving' - High Number Of Earthquakes 'Indicators Of Pending Volcanic Eruption'!

http://allnewspipeline.com/Is_It_Going_To_Blow.php


Long Valley Caldera near Mammoth Lakes has experts "concerned" because over the last 100 days the volcano has been "acting up" as NewsPrepper describes it and the unusual amount of Earthquakes that have hit Mammoth lake over the last month means all eyes should be carefully watching these earthquakes and especially this particular volcano.

    In 1915, Lassen Peak erupted and wrecked a huge portion of the state. Over the last 100 days, the much larger Long Valley Caldera has begun acting-up. And what it’s doing has Geologists at the US Geological Survey “concerned.” The Caldera – the mouth of the Volcano – is . . . . moving.

    According to scientific instruments monitored by the United States Geological Survey (USGS) the area in vicinity of the Long Valley caldera is deforming and moving rapidly compared to previous records. How sure are they? “95% (confidence interval), the (data) ensemble is significant”

    The data is showing on a recent timespan that the amount of movement is causing STATISTICALLY SIGNIFICANT STRAIN in the rock in the area. This is not conspiracy-theorist conjecture or amateur geology antics, this is from the USGS itself.


According to a March report found at AOL science and tech news, this massive super volcano "has the potential to unleash a fiery hell across the planet, and the magma-filled mountain has a history of doing so." While the article downplayed the likelihood of an imminent eruption, the article was written before the 1,000+ EQ that are being reported on now.


WOW-NEVER BEEN LIKE THIS BEFORE--1249-EQS IN THE MAMMOTH LAKES REGION OF CALIFORNIA- NEVADA BORDER AREA, OVER LAST WEEK -THESE ARE TURNING INTO VERY DANGEROUS INDICATORS OF PENDING VOLCANIC ERUPTION

Max.

Yowbarb

  • Guest
Re: The Cascadia Subduction Zone
« Reply #43 on: July 30, 2017, 09:04:37 PM »
Largest recent quake in the Cascadia Subduction Zone M5.1  July-28-2017
...

https://pnsn.org/earthquakes/recent

Yowbarb

  • Guest
Re: The Cascadia Subduction Zone
« Reply #44 on: August 04, 2017, 04:35:06 AM »
Recent quakes PNSN Pacific Northwest Seismic Network Aug 04, 2017
...

https://pnsn.org/

https://pnsn.org/earthquakes/recent

 

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