I’ve heard a few people say this. I’m curious about where that is coming from.
Siesmographs show that looser soil produces higher amplitude waves, which is much more dangerous. Bedrock produces smaller, but more frequent waves. When you build in earthquake country, the modern goal is usually to drill pillars down to bedrock.
Earthquakes on the East Coast can be felt at a great distance and can cause more pronounced shaking in comparison to those on the West Coast because rocks in the region are often older, harder and more dense.
“These are competent rocks that transmit energy well,” Simons said.
I’ve heard a few people say this. I’m curious about where that is coming from.
Siesmographs show that looser soil produces higher amplitude waves, which is much more dangerous. Bedrock produces smaller, but more frequent waves. When you build in earthquake country, the modern goal is usually to drill pillars down to bedrock.
https://www.iris.edu/hq/inclass/animation/buildings__bedrock_effects_of_amplification__liquefaction
I don’t remember exactly where I read it originally, but this article says something similar: https://www.nbcnews.com/science/science-news/earthquake-shakes-us-east-coast-rcna146575