VashonBePrepared Weekly Newsletter

Friday, March 22, 2024(web versionnewsletter version

  • Prepare in a Year: Month Two Continues
  • Action Plan Resources
  • New Washington State COVID Guidance
  • Your Chance: Be a Community Leader
 
  • Preparándose en un Año: Continuamos con el segundo mes
  • Recursos para el Plan de Acción
  • Nueva Guía de COVID del Estado de Washington
  • Su Oportunidad: de ser un Líder Comunitario

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VashonBePrepared is a coalition of some 10 disaster preparedness organizations on Vashon-Maury Island in Washington's Puget Sound region. We work closely with local and county organizations.

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Latest Updates

Seattle’s Complex Sedimentary Basin Complicates Seismic Predictions

Sep 29

Written by:
9/29/2011 9:49 PM  RssIcon

Mars Global Geologic Map 1802ABC, prepared from Viking orbital photographs and Mars Global Surveyor MOLA dataUPI reports that the Seismological Society of America said yesterday that the 2 mile complex sedimentary basin underlying Seattle can amplify earthquake shaking in a way not well modeled. Existing models assume more uniform rock substrates – ours will take more study to properly model.

Recent measurements by UW seismologists have highlighted the complicated structures underground, including a low velocity zone just west and below downtown.

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