Cascadia Earthquake: Part 4 Land, Sea and Air



The next one hundred pages will be in article form.  I will draw out the important parts, and may comment of a few. 

Click here for the Oregon Resilience Plan

The page numbers are the electric (vs. print out) number and not the true page numbers.


  •  Our knowledge of the locations of faults and the geological history of major events in Oregon is      very recent. Although Oregon has low seismicity in comparison to California and Washington, there is potential for less frequent—but much larger and more damaging—earthquakes than the crustal earthquakes that have occurred regularly in those states. Oregon has not yet seen the effect of a large damaging earthquake, and ODOT has so far expended minimal resources on  seismic retrofitting. As a result, much of Oregon’s highway system will not be usable immediately after a major seismic event. Pg 125

 Great photos of bridge damage on pages 127 through 130

The World has Not Seen

“Oregon, or even the entire nation, has never witnessed a disaster of this magnitude in modern history; therefore, we can only speculate about how this event will impact Oregonians.

 “There will not be enough firefighters to assist every household or business, nor enough medical staff to help every injured person, nor enough police officers to go door to door reminding people to be calm and quickly move to higher ground to avoid the oncoming tsunami.” Page 130 Continue reading

Cascadia Earthquake Part 3: Coastal Communities and Critical Buildings


tsunamijpg-0168170d5074aa36_largeRunning time:  55 min.

Below you can find Part 1 and 2.

The page numbers are the electric (vs. print out) number and not the true page numbers.



Today we focus on the Coastal Communities and Critical buildings.  Such as schools, government buildings and hospitals.

Picture of Seaside pg72

Click here for the link to the Oregon Resilience Plan. These podcast are based off that report.

Coastal Communities

“The vulnerability of coastal communities to tsunami hazards varies, with the most concentrated

exposure being on the northern Oregon coast (as indicated in Figure 3.3). Within the tsunami inundation zone, practically all of the 22,000 permanent residents — along with an equal or greater number of second home owners — who survive the tsunami will be instantly displaced (Wood, 2007).

The visitor population presents a great challenge, because visitors tend to congregate in the tsunami inundation zone and have the least knowledge of where and how to evacuate. Moreover, those that survive will put extreme pressure on local relief efforts, which must provide for their initial welfare.” pg73

Graph of Land in Danger Zone Pg 75 Continue reading

Cascadia Earthquake: Part 2 Timelines, Japan, Food and Bridges


1200px-HawthorneBridge-PanoRunning time: 1 hour 3 min.

Click here for Part 1:Introduction, maps and fuel

Today we go over the timeline of past great earthquakes, link between Japan and Oregon, Infrastructure/Risk.  The page numbers are the electric (vs. print out) number and not the true page numbers.

Oregon Resilience Plan—please click and follow along.


“Oregon’s buildings, transportation network, utilities and population are simply not prepared for such an event. Were it to occur today, thousands of Oregonians would die, and economic losses would be at least $32 billion.” Pg 26

 Intervals of Great Quakes

The time interval between previous earthquakes has varied from a few decades to many centuries, but most of the past intervals have been shorter than the 313 years since the last event. It is simply not scientifically feasible to predict, or even estimate. when the next Cascadia earthquake will occur, but the calculated odds that a Cascadia earthquake will occur in the next 50 years range from 7-15 percent for a great earthquake affecting the entire Pacific Northwest to about 37 percent for a very large earthquake affecting southern Oregon and northern California. Pg 30

The simulation shows that Oregon would experience shaking very similar to the shaking that northern Japan endured in 2011. As indicated in Figure 1.4, areas along Oregon’s coast would experience severe to violent shaking, while cities along the I-5 corridor would experience strong or very strong shaking. East of the Cascades, shaking would be light to moderate. In all areas, the strong shaking would last from two to four minutes. Pg 31

Oregon’s Infrastructure and Risk

This means that the majority of buildings in Oregon have not been designed to resist the shaking from a magnitude 9.0 Cascadia earthquake. This widespread vulnerability of Oregon’s buildings is grimly illustrated in the Statewide Seismic Needs Assessment completed by the Oregon Department of Geology and Mineral Industries (DOGAMI) in 2007.pg38

Of the 2,567 highway bridges in the Oregon Department of Transportation (ODOT) system, 982 were built without seismic considerations, and of the rest, only 409 were designed specifically with consideration of Cascadia subduction zone earthquakes. Continue reading

Cascadia Earthquake: Part 1–Introduction, maps and fuel



What is it?

Oregon Resilience Plan


:”For more than 300 years, a massive geological fault off America’s northwest coast has lain dormant. Well into that interval, Meriwether Lewis and William Clark journeyed to the mouth of the Columbia River and returned to Washington, D.C. to tell the new United States about what came to be known as the Oregon Country. Tens of thousands of settlers crossed the Oregon Trail to establish communities throughout the Willamette Valley, in coastal valleys, and beside natural harbors. With the provisional government established in 1843 followed by statehood in 1859, the modern history of Oregon began. Industries rose and fell, cities and towns grew . . . and still the fault lay silent.” Page 9

Map of Impact Zone Pg 15

Intervals of earthquake activity

“The Cascadia Earthquake Scenario Task Group (Chapter One) reviewed current scientific research to  develop a detailed description of the likely physical effects of a great (magnitude 9.0) Cascadia subduction zone earthquake and tsunami, providing a scenario that other task groups used to assess impacts on their respective sectors.” pg 17 Continue reading

Episode 12: Links of Interest


Newberry-CraterRunning Time:  39:30


Pacific Threat

Earthquake Prediction System  by Suspicious0bservers 

PBEM tour: Portland’s new emergency coordination center.


Protect yourself on the Net

Is Somebody Watching Me 


Exploding Firball observed in Japan, Russia, Cuba   Continue reading