Module 2: Geotechnical investigations for earthquake engineering

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About this document

  • Published on 29 November 2021
  • Updated on 29 November 2021
  • Of interest to Building consent authorities, Engineers,
  • ISBN: 978-0-947524-45-6 (Print) / 978-0-947524-46-3 (Online)


Module 2 of the Earthquake Geotechnical Engineering Practice guidelines provides guidance on appropriate investigations to assess the ground conditions to support the seismic design of new structures.


Developed jointly by MBIE and the New Zealand Geotechnical Society, the module is part of the Earthquake Geotechnical Engineering Practice series and relates specifically to earthquake site investigation.

High level changes in this version include

  • Additions and changes to Section 2.4 Site investigation planning
    • Expanded and revised geophysical (shear wave) test procedures - most importantly a significant revision of the section on surface wave shear testing
    • Revision of the recommended density of investigations to ensure better alignment with other guidance
    • Incorporation of stronger link to the recent NZ Ground Investigation Specification.
  • Update to Section 2.7 New Zealand Geotechnical Database (NZGD) encouraging users of the database to upload data they gather from subsurface investigations as per the database's terms of use
  • Minor content revisions, clarifications and updates, including consideration and incorporation of relevant existing feedback.

Previous version

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Other resources that are available include:

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