Until recently, scientists were puzzled why an earthquake of only 7.5 magnitude caused a devastating tsunami that killed over 2,000 people on the island of Sulawesi in Indonesia in September of 2018. The earthquake didn’t even trigger the tsunami early warning system as normally a tsunami of the size (wave height up to 11m or 36 ft) would require an 8.4 or higher magnitude earthquake. A new study published in the journal Pure and Applied Geophysics has found that the cause of the tsunami was actually a marine landslide in Palu Bay on the west coast of Sulawesi. A combination of computer modeling and observation of the actual sea level data from the event was used to reach their conclusion. They observed a wave period that was very short, consistent with the 3 to 4 minutes expected based on the modeling of a marine landslide compared to the 15 to 60 minute periods for an earthquake-induced tsunami.
Some juicy geoengineering news items in this post. I could turn just about all of them into a separate blog post if I had time, maybe I still will for some of them. Don’t miss this list! All of the links are active when you view it on the site. If you’re looking at this in your RSS feed reader or on your daily email, you won’t see the actual links, sorry.
- San Diego settles landslide suits for $284,000 – San Jose Mercury News
- Slip On Weak Layer – GEO-SLOPE International Ltd.
An example analysis using SLOPE/W software.
- UK’s first commercial scale geothermal power plant set to start construction in October – Ground Engineering (GE) Magazine
- Some reflections on the Eyjafjallajoekull ash cloud – Dave’s Landslide Blog
As usual, Dr. Dave has some great insights into this geologic hazard that is currently dominating the news.
- Port of Miami tunnel project on track for June start – MiamiHerald.com via ASCE SmartBrief
- Louisiana receives $81.5 million in new federal aid for repair of roads and bridges damaged by Hurricane Katrina – NOLA.com
- New imagery from the Qinghai earthquake | Google Earth Blog
- Geogrids remedy poor site soils at World Cup stadium in South Africa – Geosynthetics Magazine
- Geo-Engineering Reconnaissance of the February 27, 2010 Maule, Chile Earthquake, Version 1: April 15, 2010 – Geoengineer.org Press Center
The GEER is an NSF-funded group that was created to collect perishable data in the wake of extreme events (e.g., earthquakes, tsunamis, hurricanes, landslides, or floods) in the interests of learning from the events to advance the state of geoengineering practice. This report on the earthquake was produced by over 40 lead authors and contributing authors from universities and consulting companies around the world.
- A Decade of Safety Success, March/April 2010 Public Roads
…And 13 more! […]