The magnitude 7.8 earthquake in Kaikoura New Zealand in 2016 caused over 50 landslides along State Highway 1, north and south of the Town. The team of engineers tasked with reopening the corridor to road and rail traffic needed a rockfall barrier system with a small footprint and wanted to incorporate precast blocks being used elsewhere on the corridor for other purposes. They contacted Holmes Solutions to do a full-scale impact test of the system. The precast concrete blocks are what you would see on the roadway side of the barrier. The back side of the barrier system consists of gabion baskets with some kind of sand layer in between the baskets and the blocks. Click on the video to see the outcome of the test!
[Updated May 30, 2008] I forgot to publish this post to the front page, whoops! The two links still have excellent information. In particular, Dave’s Landslide Blog has coverage of the many landslide lakes and the efforts to breach some of them. [/Update]
The latest numbers according to AFP, Worldwide News Agency, is 71,000 dead, missing or buried and over 5 million homeless. There were many victims that were buried by landslides and rockfall. In the past few days 200 rescue workers have been buried by mudslides.
October 17 was the 18th anniversary of the 6.9 magnitude Loma Prieta earthquake that struck the Bay area. But a recent story by the Bay Area’s local ABC affiliate, ABC7, chose to focus on another earthquake, a 1868 earthquake of about the same magnitude that occurred on the Hayward Fault. According to the USGS, the Hayward Fault has a return period of about 140-years and "It’s the most heavily urbanized fault in the U.S. and it’s just waiting to go off…" Next year will be the 140-th anniversary of the last earthquake on the Hayward Fault. At some point it has the potential to be a very bad earthquake there. More after the break. (Photo by sanbeiji)