seaside oregon l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Seaside, Oregon PowerPoint Presentation
Download Presentation
Seaside, Oregon

Loading in 2 Seconds...

play fullscreen
1 / 17

Seaside, Oregon - PowerPoint PPT Presentation


  • 460 Views
  • Uploaded on

Seaside, Oregon Harry Yeh Oregon State University Seaside, Oregon, Tsunami Pilot Study – Modernization of FEMA Flood Hazard Maps A Tsunami Pilot Study was carried out in the Seaside area to develop a Tsunami Hazard Analysis methodology as part of FEMA's Map Modernization Program.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Seaside, Oregon' - adamdaniel


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
seaside oregon

Seaside, Oregon

Harry Yeh

Oregon State University

seaside oregon tsunami pilot study modernization of fema flood hazard maps
Seaside, Oregon, Tsunami Pilot Study – Modernization of FEMA Flood Hazard Maps
  • A Tsunami Pilot Study was carried out in the Seaside area to develop a Tsunami Hazard Analysis methodology as part of FEMA's Map Modernization Program.
  • The Seaside area was chosen because it is typical of many coastal communities in the Pacific Northwest Coast, and because State agencies and local stakeholders expressed considerable interest in mapping the tsunami threat to this area.
  • Concern with tsunamis generated by Cascadia subduction.
slide5

Examples of co-seismic vertical sea floor displacement

Tsunami sources of Cascadia Subduction Earthquake

slide6

Discovery of Great Cascadia

Earthquake on January 26, 1700

  • Paleo-tsunami deposits, radio-carbon and tree ring dating of vegetation killed by an earthquake along Pacific Northwest coast (1987, Science)
  • Historical (“OLD”) documentation of coastal flooding in Japan (1996, Nature)
  • Legends and myths of Pacific Northwest Native Americans.
slide7

Paleo-tsunami deposits

At Willapa Bay, Washington

Old Japanese Documents

on Coastal Flooding on January 1700

(Atwater, 2005)

slide9

Tsunami Deposits found in Seaside

Older Events

1964 Akaska

1700 Cascadia

slide10

Map of 100- and 500-year flood zones overlaid on FEMA Flood Insurance Rate Maps.

Seaward limit is mean lower low water.

Line showing extent of deposits from tsunami generated by 1700 Cascadia earthquake is included for comparison.

Evacuation distance to high-ground safe haven from the beach is approximately 2 km.

tsunami shelters
Tsunami Shelters

Nishiki Tower in Japan