A Silent Build-up in Seismic Energy Precedes Slow Slip Failure in the\n Cascadia Subduction Zone

2019/09/15 by Claudia Hulbert, Hulbert, Claudia, Bertrand Rouet‐Leduc +3
Earth and Planetary Sciences · Computer Science · #earthquake and tectonic studies #Seismology and Earthquake Studies #Earthquake Detection and Analysis

paper · pdf · doi:10.48550/arxiv.1909.06787

Abstract

We report on slow earthquakes in Northern Cascadia, and show that continuous\nseismic energy in the subduction zone follows specific patterns leading to\nfailure. We rely on machine learning models to map characteristic energy\nsignals from low-amplitude seismic waves to the timing of slow slip events.\n We find that patterns in seismic energy follow the 14-month slow slip cycle.\nOur results point towards a recurrent build-up in seismic energy as the fault\napproaches failure. This behavior shares a striking resemblance with our\nprevious observations from slow slips in the laboratory.\n

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