VashonBePrepared Weekly Newsletter

Newsletter #161 Friday, December 6, 2024: (full newsletter)

  • Respiratory Virus Season: Just Around the Corner
  • First Defense: Vaccination
  • Deploy Layers of Protection
     
  • Temporada de Virus Respiratorios: A la Vuelta de la Esquina
  • Primera Línea de Defensa: Vacunación
  • Implemente Capas de Protección

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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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