Gregg Drilling
Available Resources

Free CPT Webinar on December 2, 2016 at 12:00 PM PST

Gregg Drilling is pleased to announce our next free CPT webinar! Please register for CPT worked examples using CLiq version 2 on Dec 2, 2016 12:00 PM PST at: https://attendee.gotowebinar.com/register/4106279384711778818 This webinar provides worked examples […]


Available Resources

2015 Seed Lecture – Peter Robertson on Liquefaction

Peter K. Robertson, Ph.D., P.Eng, Professor Emeritus, University of Alberta, Technical Advisor, Gregg Drilling & Testing Inc. is the 2015 recipient of the H. Bolton Seed Medal for outstanding contributions to teaching, research, or practice […]


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Geologic Hazards

Video: Geotechnical investigation of the March 11, 2011 Tohoku Earthquake, Japan

5619603229_55577ce7caThe NSF funded Geotechnical Extreme Events Reconnaissance (GEER) team has provided a preliminary report and some amazing photos and video of the damage to various regions of Japan affected by the moment magnitude 9.0 earthquake that struck on March 11, 2011.  Read on to see some amazing photos and video of the liquefaction damage related to the Tohoku Earthquake in Japan. (Photos from Oregon State Flickr)

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Geologic Hazards

Video: UC Davis team studies liquefaction in Japan

  "I’m a member of an organization, the Geotechnical Extreme Events Reconnaissance Organization," said U.C. Davis Professor Ross Boulanger, Ph.D. Boulanger recently led a team of researchers in Japan, looking at how the dramatic earthquake […]


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Geologic Hazards

Christchurch, New Zealand Earthquake February 2011 News Resources

Christchurch Earthquake Map

A deadly magnitude 6.3 earthquake struck Christchurch, New Zealand on February 22, killing at least 147 and with around 200 still missing.  Many buildings have been badly damaged or destroyed and residents also had to deal with large quanities of mud and water which was a result of the liquefaction.  The same region was affected by a 7.1 magnitude quake in September of 2010.  That earthquake was centered deeper and farther from the metropolitan area so there were fewer casualties and less damage.  But many buildings that had recently been repaired, or were even still under repair were devastated once again.  Some early reports were calling this earthquake an aftershock of the September earthquake, but maps I’ve seen (at right) show pretty clearly it was a different fault segment that ruptured during this earthquake.  I have a collection of links below that might be of interest. My heart goes out to the people of New Zealand affected by this disaster.

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