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Video of Highway 101 Landslide in California
Looks like the Facebook video gets cropped when I embedded it here. You ca
San Francisco Millennium Tower Has Settled 16 Inches
Misrepresents actual foundation geometry. Photos show deep excavation to ne
New FHWA Soil Nail Manual Addresses LRFD, Hollow Bars
Good evening from Barcelona, Spain. I am witting to you because of I am le
Engineering Geologists vs Geological Engineers vs Geotechnic
Geological engineer from Spain (looking for job smiley geoengineer.martin@gmail
Geologic Hazards
Regulators aware for years of understated seismic risks to nuclear plants PDF Print E-mail
Written by Randy Post   
Wednesday, 30 March 2011 05:22
Nuclear Reactors in the US overlaid on USGS Probability of Strong Shaking Map

With the events in Japan on everyone's mind, it's of course to be expected that seismic safety at nuclear power plants in the U.S. becomes a hot topic. This article discusses how the Nuclear Regulatory Comission has an on-going study to assess the seismic hazard of existing and proposed nuclear power plants in the eastern 2/3 of the country, where the risk is greater than was originally thought.

Nearly six years before an earthquake ravaged Japan’s Fukushima Daiichi nuclear power plant, U.S. regulators came to a sobering realization: seismic risks to nuclear plants in the eastern two-thirds of the country were greater than had been suspected, and engineers might have to rethink reactor designs.
[Source: The Center for Public Integrity via Ontario-geofish. Image: The Center for Public Integrity]

Christchurch, New Zealand Earthquake February 2011 News Resources PDF Print E-mail
Written by Randy Post   
Monday, 07 March 2011 12:57

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.

Last Updated on Monday, 07 March 2011 13:20
Video: Rockslide Damages Wisconsin Home PDF Print E-mail
Written by Randy Post   
Tuesday, 01 March 2011 09:35

Wisconsin_Rockslide_WXOW A 50-ton boulder caused severe damage to a La Crosse, Wisconsin home after a rockslide event near the appropriately named Cliffwood Lane.  Residents in some adjacent houses were asked to evacuate as well.  Click through for the news coverage of the rockslide. [Source and Image: WXOW. Hat tip to USGS]

Last Updated on Tuesday, 01 March 2011 09:35
Massive Open Pit Mine Landslide in Turkey PDF Print E-mail
Written by Randy Post   
Sunday, 13 February 2011 16:46
Open pit mine landslide in Turkey

A massive, possibly 50 million cubic meter landslide occurred on Thursday in Kahramanmaraş Province of Turkey. Not too many details yet, but early reports had 9 miners missing and 1 killed. The landslide occurred in the Çöllolar coalfield. Dr. Dave's post has a few more photos and a link to a Turkish video. [Source: The Landslide Blog. Image: The Landslide Blog]

San Clemente landslide threatens houses, displaces residents PDF Print E-mail
Written by Randy Post   
Thursday, 13 January 2011 01:25
San Clemente homes affected by landslide

A total of 4 homes were red-tagged in San Clemente, California as the cliff behind their properties gave way onto a golf course below. One neighbor saw her tree disappear as the cliff face has now marched up to patios and back porches on several homes. [Source: Image: LA Times]

The outcome of a study of the Kolontar Tailings Dam failure PDF Print E-mail
Written by Randy Post   
Sunday, 02 January 2011 16:52
Kolontar Hungary Bauxite Tailings Dam Failure

The devastating failure of a tailings dam in Kolontar, Hungary made headlines for the incredible environmental disaster created by the bauxite tails. In a presentation by an investigator that was located by Dr. Dave, the results of the investigation are in. The bottom line? The dam was constructed of fly ash without a liner and with little consideration given to the foundation. The seepage observed in advance of the failure indicated that excess pore water pressure was a key factor in the disaster. Dr. Dave has a link to the presentation. [Source: The Landslide Blog. Image: Greenpeace via The Landslide Blog]

Pacific Northwest Rain, Flooding and Landslides PDF Print E-mail
Written by Randy Post   
Tuesday, 14 December 2010 23:26

The Pacific Northwest has been hit by some heavy rainfall and associated flooding and landslides. Here are a few links that may be of interest.

Battle brewing over landslide damage to Macon County NC home PDF Print E-mail
Written by Randy Post   
Sunday, 21 November 2010 17:35
16-in landslide scarp in the driveway of a Macon County, NC home

A home owner with a condemned piece of property containing a landslide scarp in his driveway contends that the landslide was caused by a developer excavating and blasting at the toe of the slope below him. The developer admits no fault for loss of property. I'm surprised to see the state geologists weigh in so strongly in a case that could clearly end up with legal implications. [Source: Image:]

St. Jude, Quebec Five Months After the Deadly Landslide PDF Print E-mail
Written by Randy Post   
Sunday, 31 October 2010 17:16
Sign and barricades at the road closed by the St. Jude Landslide in Quebec

It's been over 5 months since the massive St. Jude landslide that claimed the lives of four residents. The quick clay landslide took place on May 10, 2010, and in this article, it is clear that the residents are still recovering. The potential for more landslides like that one was on everyone's minds...and still is. [Source: Montreal Gazette. Image: Dario Ayala / Montreal Gazette]

Council to visit site of Logan, Utah canal landslide PDF Print E-mail
Written by Randy Post   
Sunday, 31 October 2010 17:15
Logan Canal Landslide

Various stakeholders are meeting at the site of the fatal landslide to discuss the various options for replacing or realigning the portion of the canal that failed. [Source: Image: Landslides Under a Microscope Blog]

The Hungarian mining accident - images of the failure of the impounding embankment PDF Print E-mail
Written by Randy Post   
Tuesday, 05 October 2010 16:04
Hungary Bauxite Tailings Dam Failure

The image of this failed bauxite tailings dam is very tragic and the pictures of the impact to the local town are very sad. But one thing that struck me about this particular image is how it appears that the failure occurred at the corner of the tailings impoundment. How many of us geotechnical engineers would have analyzed the corner? Most of the time you would pick a cross-section that appears to be conservative and go with that. Maybe you analyze both sides, but likely not the corner. I wonder what happened in this case...interesting. [Source: Dave's Landslide Blog. Image: Dave's Landslide Blog]

Colombia Landslide: Dozens Killed When Mudslide Buries Mountain Highway And Homes PDF Print E-mail
Written by Randy Post   
Thursday, 30 September 2010 13:06

A group of villagers in an area Northwest of Bogota, Columbia were changing buses to cross a portion of road that was blocked by a previous landslide when they were caught up in a second landslide. 30 people were burried alive. According to Sky News, an engineer was on site video taping the area when the second slide occurred and captured the event on tape. The resulting video is shown below.

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