A recent voyage got up close and personal with an underwater fault that could reshape life in the Pacific Northwest.
Anne Trehu, a Professor Emeritus who worked at Oregon State University says "There have been prior experiments looking at elements of the subduction zone, smaller areas with higher resolution since the mid-1980s, but this was the first experiment with the same kind of data system that got data along almost the whole subduction zone."
Trehu is a seismologist who has studied the Cascadia Subduction Zone for years.
In 2021, a research vessel went from Vancouver Island to the Oregon-California border to gather data.
"The hopes were to define what the subsurface structure is and with current technology, there were very few profiles acquired with state-of-the-art technology," she says.
Both students and professors gathered data from land and sea during this voyage.
Data showed this fault zone is not one continuous structure, but four separate segments.
Trehu says, "Fascinating data set and this is the first paper to come from it and the first step in the analysis. From a scientific point of view, there are a number of big questions that will be answered."
She hopes the new data will help determine how a Cascadia Subduction Zone quake could impact the Pacific Northwest, and what can be done to plan for it.
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