Summary:
- This article discusses how sediments from the deep ocean floor off the coast of the Pacific Northwest in North America provide a detailed record of major earthquakes that have occurred in the Cascadia subduction zone over the past thousands of years.
- The sediment layers reveal a history of large, powerful earthquakes that have struck the region, with the most recent one occurring in 1700 CE. These earthquakes are caused by the movement and collision of tectonic plates deep beneath the ocean.
- Understanding this history of earthquakes in the Cascadia region is important for scientists to better prepare and plan for future seismic events that could have significant impacts on the coastal communities in this area.