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
  • Free Safety Management Software Demo

    IndustrySafe Safety Management Software helps organizations to improve safety by providing a comprehensive toolset of software modules to help businesses identify trouble spots; reduce claims, lost days, OSHA fines; and more.

  • Get the Ultimate Guide to OSHA Recordkeeping

    When it comes to OSHA recordkeeping there are always questions regarding the requirements and in and outs. IndustrySafe is here to help. We put together this page with critical information to help answer your key questions about OSHA recordkeeping.

  • Safety Training 101

    When it comes to safety training, no matter the industry, there are always questions regarding requirements and certifications. We put together a guide that’s easy to digest so you can ensure you're complying with OSHA's training standards.

  • Conduct EHS Inspections and Audits

    Record and manage your organization’s inspection data with IndustrySafe’s Inspections module. IndustrySafe’s pre-built forms and checklists may be used as is, or can be customized to better suit the needs of your organization.

  • Track Key Safety Performance Indicators

    IndustrySafe’s Dashboard Module allows organizations to easily track safety KPIs and metrics. Gain increased visibility into your business’ operations and safety data.

  • Industry Safe
comments powered by Disqus