VashonBePrepared Weekly Newsletter

Friday, April 12, 2024: (web version | newsletter version) 

  • Making Water Safe: Prepare in a Year Continues
  • Start with Clear Water
  • Four Ways to Purify Water
  • Free Health Fair: Coming Up!
     
  • Como tener Agua Limpia: Continuamos con Preparándose en una Año
  • Empiecen con Agua Clara
  • Cuatro Formas de Purificar el Agua
  • Feria de la Salud Gratis: ¡Viene muy Pronto!

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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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