Last edited by Milrajas
Saturday, February 15, 2020 | History

2 edition of Earthquake-hazard geology maps of the Portland Metropolitan Area, Oregon found in the catalog.

Earthquake-hazard geology maps of the Portland Metropolitan Area, Oregon

Ian Madin

Earthquake-hazard geology maps of the Portland Metropolitan Area, Oregon

text and map explanation

by Ian Madin

  • 243 Want to read
  • 6 Currently reading

Published by State of Oregon, Dept. of Geology and Mineral Industries in Portland, Or .
Written in English

    Subjects:
  • Faults (Geology) -- Oregon -- Clackamas County -- Maps.,
  • Faults (Geology) -- Oregon -- Washington County -- Maps.,
  • Faults (Geology) -- Oregon -- Multnomah County -- Maps.,
  • Earthquake hazard analysis -- Oregon -- Clackamas County -- Maps.,
  • Earthquake hazard analysis -- Oregon -- Washington County -- Maps.,
  • Earthquake hazard analysis -- Oregon -- Multnomah County -- Maps.

  • Edition Notes

    Statementby Ian P. Madin.
    GenreMaps.
    SeriesOpen-file report / State of Oregon, Department of Geology and Mineral Industries -- O-90-2., Open-file report (Oregon. Dept. of Geology and Mineral Industries) -- O-90-2.
    ContributionsOregon. Dept. of Geology and Mineral Industries., Geological Survey (U.S.), National Earthquake Hazards Reduction Program (U.S.)
    The Physical Object
    Pagination21 p. ;
    Number of Pages21
    ID Numbers
    Open LibraryOL18004297M

    If the company finds that its estimated PML is too high, it reduces its capacity for earthquake insurance in favor of noncatastrophic insurance, thereby reducing its PML exposure. Some insurance actuaries believe that the premiums are still too low to protect against catastrophic losses; that is, CEA is still not cost based. In evaluating a site for its landslide potential, Scott Burns of Portland State University uses a three-strike rule. Disaster relief is sure to be provided, but recovery from the disaster is a political issue and is fraught with uncertainties. But, unlike the situation with fire and auto insurance, the insurance industry lacks enough reliable information on catastrophic events to estimate its possible losses, and therefore to set a realistic premium.

    Then, suddenly, out of the strange silence and strange motion there came a tremendous roar. Because of the war, there was little money for reconstruction after the earthquakes, and two years later, much of the rubble in the Wairarapa Valley had not even been cleared. It is prudent to install strong-motion accelerometers in all major structures such as dams or skyscrapers. In evaluating a site for its landslide potential, Scott Burns of Portland State University uses a three-strike rule. Severe liquefaction also occurred in the delta of the Nisqually River east of Olympia Figurebut much of that area is a wildlife refuge, an appropriate use for this unstable ground.

    Insurance companies representing more than 70 percent of the residential property insurance market agreed to participate by signing Earthquake-hazard geology maps of the Portland Metropolitan Area Participating Carrier Agreement to write policies on all eligible categories in the CEA. The source for these dikes is the beach sand marking the base of the terrace. The legislature refused for the reason that it would have left millions of homeowners unable to buy earthquake insurance at an affordable price. In the time period fourteen earthquakes with magnitudes between 3. The company has an executive department that determines overall corporate direction including the basic decision about whether or not the company wants to be in the earthquake insurance business at alla department that sends out your statement, a department that settles your claim, and a department that worries about risk so that the price of the premium fits the risk exposure of the company. The fluid emerged much faster than it could spread, so that within a few seconds the flow front had become a surge several centimeters high, like a small wave traveling up a dry beach.


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Earthquake-hazard geology maps of the Portland Metropolitan Area, Oregon by Ian Madin Download PDF Ebook

In some cases, the slide mass moves slowly enough that people can get out of its way, but in rockfalls and rock avalanches, such as the large slides in Alaska, Peru, and Montana discussed in a previous section, Oregon book motion of the rock and soil mass is so quick that people are overwhelmed before they have an opportunity to get out of the way.

The Coast Range, Olympic Mountains, and the Cascades bear the scars of thousands of landslides that have been mapped by geologists. And just this past Tuesday, a 4. Immediately after the earthquake, insurance companies placed a moratorium of thirty days on writing new policies.

New Zealand New Zealand, like the Pacific Northwest, is a land of great natural beauty in which the spectacular mountains and volcanoes are related to natural hazards, especially earthquakes and volcanic eruptions.

SearchWorks Catalog

Oregon book Although the short-term losses would be immense, the net impact over a ten-year period would be largely minimized due to this inflow of overseas money.

There is a very real possibility that the dam could fail1, which would result in extensive lowland Earthquake-hazard geology maps of the Portland Metropolitan Area along the river valley and Duwamish. However, as of Septemberno funds have been authorized for either the surveys or retrofits, except for a bond issue passed for Portland Public Schools.

However, the Legislature failed to appropriate money to begin the project, and also did not pass a major transportation bill that would have addressed the problem of obsolete bridges, a problem the OSSPAC survey had highlighted.

Environmental Geology, Fifth Edition. For example, the magnitude 6. The Legislature authorized a resilience survey to be supervised by OSSPAC, which presented a grim future Oregon book Oregon is struck with the next subduction-zone earthquake.

Liquefaction and lateral spreading were concentrated in those areas Palmer and his associates had predicted would be hazardous. Washington Geology, v. Grants were awarded for the retrofit of schools after the Scotts Mills Earthquake.

Twenty-one percent of businesses had earthquake insurance, but most of their direct losses were less than their deductible, typically 10 percent of the value of the building and contents.

When these plates collide, one plate slides subducts beneath the other, where it is reabsorbed into the mantle of the earth. It can do this because it calculates approximately how many house fires and auto accidents it is likely to have to pay off during the premium period.

Different sets of curves were obtained for the crustal earthquakes. However, the federal government does respond to disasters, and it did so after the Northridge and Nisqually earthquakes. New inkjet printers with their higher speed and near-photo quality production are used for quantities of under Wetlands were removed, streams covered or realigned, hilly features regraded, and damming waterbodies.

Billions of dollars of federal assistance might be forthcoming, although this is generally a one-shot deal—aid that is nonrecurring. The principle of indemnity which excludes life insurance, of course is to return the insured person or business to the condition that existed prior to the loss.

Operations assigned to OEM include the statewide emergency number, search and rescue, and a state emergency coordination center.Maps of the Portland, Salem, Eugene, and Victoria metropolitan areas showing regions susceptible to liquefaction and landsliding related to earthquakes were designed to highlight those areas where the danger from earthquakes might be much greater than other areas.

The Oregon Museum of Science and Industry are affected by regional and local geology; relative earthquake hazard maps then provide comparisons of hazards on county, city, and neighborhood scales.

Inquiry-based field investiga- The city of Portland and its metropolitan area. Partial funding provided by National Earthquake Hazard Reduction Program through Madin, I.P.,Earthquake-hazard geology maps of the Portland metropolitan area: Oregon of GeoloO' and Mineral Industries Open-File Report21 p., 8 maps.

and Twelker, N.H.,Earthquake geology of the Portland area, Oregon: Oregon.Relative earthquake hazard map: Portland, Oregon /2 minute quadrangle Pdf by Matthew A.

Mabey and Ian P. Madin, Oregon Department of Geology and Mineral Industries ; David E. Drescher, O. Gerry Uba, and Mark Bosworth, Metro.Name: Relative Earthquake Hazard (DOGAMI) Display Field: ZONE Type: Feature Layer Geometry Type: esriGeometryPolygon Description: Relative Earthquake Hazard Map of the Portland Metro Region, Clackamas, Multnomah, and Washington Counties, Oregon, originally published in hardcopy form by Oregon Department of Geology and Mineral Industries as IMS.Earthquake Information for Tigard, Oregon.

Tigard, Ebook has a high earthquake risk, with ebook total of earthquakes since The USGS database shows that there is a % chance of a major earthquake within 50km of Tigard, OR within the next 50 years. The largest earthquake within 30 miles of Tigard, OR was a Magnitude in