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Stress-testing the Cascadia Subduction Zone reveals variability that could impact how earthquakes spread

The Cascadia Subduction Zone is unusually quiet for a megathrust fault. Spanning more than 600 miles from Canada to California, the fault marks the convergence of the Juan de Fuca and North American plates. While other subduction zones produce sporadic rumblings as the plates scrape past each other, Cascadia shows very little seismic activity, fueling assumptions that the plates are locked together by friction. (more…)

‘Slow Slip’ Earthquakes’ Hidden Mechanics Revealed

By Guest PostJune 20, 2021Environmentadrien arnulf, damaging quakes, hikurangi subduction zone, laura wallace, motion tremor, new zealand, slow slip earthquake, subduction zone, tectonic energy

AUSTIN, Texas — Slow slip earthquakes, a type of slow motion tremor, have been detected at many of the world’s earthquake hotspots, including those found around the Pacific Ring of Fire, but it is unclear how they are connected to the damaging quakes that occur there. Scientists at The University of Texas at Austin have now revealed the earthquakes’ inner workings using seismic CT scans and supercomputers to examine a region off the coast of New Zealand known to produce them. (more…)

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Stress-testing the Cascadia Subduction Zone reveals variability that could impact how earthquakes spread

‘Slow Slip’ Earthquakes’ Hidden Mechanics Revealed