Earthquake Did Not Alter Monument's Settling

The latest survey of the National Mall shows the 5.8-magnitude earthquake one year ago did not affect how fast the 555-monument is settling. Since 1901, it has settled approximately 2.2 inches.

The 5.8-magnitude earthquake that occurred Aug. 23, 2011, from a fault located in Virginia did not affect how the 555-foot Washington Monument is settling, according to a 2012 survey conducted by NOAA's National Geodetic Survey. NOAA shared the findings of the survey on Aug. 22, just ahead of the event's anniversary.

Based on five leveling surveys taken since 1926, the part of the National Mall built on landfill where the monument is located has settled about 1 inch, moving at a rate of approximately 0.013 inches per year. The monument itself is settling 0.02 inches per year, according to multiple measurements taken since 1901 that indicate it has settled about 2.2 inches overall since then.

The latest NGS survey, conducted at the request of the National Park Service, included the entire National Mall. Repairs to cracks in the monument that resulted from the earthquake have yet to begin.

Download Center

HTML - No Current Item Deck
  • Safety Management Software - Free Demo

    IndustrySafe Safety Software’s comprehensive suite of modules help organizations to record and manage incidents, inspections, hazards, behavior based safety observations, and much more. Improve safety with an easy to use tool for tracking, notifying and reporting on key safety data.

  • Create Flexible Safety Dashboards

    IndustrySafe’s Dashboard Module allows organizations allows you to easily create and view safety KPIs to help you make informed business decisions. Our best of breed default indicators can also save you valuable time and effort in monitoring safety metrics.

  • Schedule and Record Observations

    IndustrySafe's Observations module allows managers, supervisors, and employees to conduct observations on employees involved in safety critical behavior. IndustrySafe’s pre-built BBS checklists may be used as is, or can be customized to better suit the needs of your organization.

  • Why Is Near Miss Reporting Important?

    A near miss is an accident that's waiting to happen. Learn how to investigate these close calls and prevent more serious incidents from occurring in the future.

  • Get the Ultimate Guide to Safety Training

    When it comes to safety training, no matter the industry, there are always questions regarding requirements and certifications. We’ve put together a guide on key safety training topics, requirements for certifications, and answers to common FAQs.

  • Industry Safe
comments powered by Disqus

OH&S Digital Edition

  • OHS Magazine Digital Edition - June 2019

    June 2019

    Featuring:

    • ASSP SAFETY 2019 PREVIEW
      New Orleans Networking
    • NATION SAFETY MONTH
      Heed These Summer Safety Tips
    • TRAINING
      Education, Skill Development, and Behavior Change
    • SAFETY MANAGEMENT
      What Good Looks Like
    View This Issue

Bulwark Quiz