Similarities and differences between natural and simulated slow earthquakes
We investigate similarities and differences between natural and simulated slow earthquakes using nonlinear dynamical system tools. We use spatio-temporal slip potency rate data derived from Global Navigation Satellite System (GNSS) position time series in the Cascadia subduction zone and numerical s...
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sg-ntu-dr.10356-1816222024-12-16T15:30:50Z Similarities and differences between natural and simulated slow earthquakes Gualandi, A. Zilio, Luca Dal Faranda, D. Mengaldo, G. Asian School of the Environment Earth Observatory of Singapore Earth and Environmental Sciences Self-organized criticality Slow earthquakes We investigate similarities and differences between natural and simulated slow earthquakes using nonlinear dynamical system tools. We use spatio-temporal slip potency rate data derived from Global Navigation Satellite System (GNSS) position time series in the Cascadia subduction zone and numerical simulations intended to reproduce their pulse-like behavior and scaling laws. We provide metrics to evaluate the accuracy of simulations in mimicking slow earthquake dynamics. We investigate the influence of spatio-temporal coarsening as well as observational noise. Despite the use of many degrees of freedom, numerical simulations display a surprisingly low average dimension, akin to natural slow earthquakes. Instantaneous dynamical indices can reach large values (>10) instead, and differences persist between numerical simulations and natural observations. We propose to use the suggested metrics as an additional tool to narrow the divergence between slow earthquake observations and dynamical simulations. Ministry of Education (MOE) Nanyang Technological University Published version The research of A. Gualandi was supported by the Isaac Newton Trust (INT) grant “Cascadia Kinematics and Dynamics” (reference code LBZH). L. Dal Zilio was supported by the European Research Council (ERC) Synergy Grant “Fault Activation and Earthquake Rupture” (FEAR) (No.856559), the Earth Observatory of Singapore (EOS), and the Singapore Ministry of Education Tier 3b project “Investigating Volcano and Earthquake Science and Technology (InVEST)” (Award No. MOE‐MOET32021‐0002). 2024-12-11T00:53:34Z 2024-12-11T00:53:34Z 2024 Journal Article Gualandi, A., Zilio, L. D., Faranda, D. & Mengaldo, G. (2024). Similarities and differences between natural and simulated slow earthquakes. Geophysical Research Letters, 51(14), 109845-. https://dx.doi.org/10.1029/2024GL109845 0094-8276 https://hdl.handle.net/10356/181622 10.1029/2024GL109845 2-s2.0-85198644269 14 51 109845 en MOE-MOET32021-0002 Geophysical Research Letters © 2024. The Author(s). This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. application/pdf |
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Earth and Environmental Sciences Self-organized criticality Slow earthquakes Gualandi, A. Zilio, Luca Dal Faranda, D. Mengaldo, G. Similarities and differences between natural and simulated slow earthquakes |
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We investigate similarities and differences between natural and simulated slow earthquakes using nonlinear dynamical system tools. We use spatio-temporal slip potency rate data derived from Global Navigation Satellite System (GNSS) position time series in the Cascadia subduction zone and numerical simulations intended to reproduce their pulse-like behavior and scaling laws. We provide metrics to evaluate the accuracy of simulations in mimicking slow earthquake dynamics. We investigate the influence of spatio-temporal coarsening as well as observational noise. Despite the use of many degrees of freedom, numerical simulations display a surprisingly low average dimension, akin to natural slow earthquakes. Instantaneous dynamical indices can reach large values (>10) instead, and differences persist between numerical simulations and natural observations. We propose to use the suggested metrics as an additional tool to narrow the divergence between slow earthquake observations and dynamical simulations. |
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Asian School of the Environment |
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Asian School of the Environment Gualandi, A. Zilio, Luca Dal Faranda, D. Mengaldo, G. |
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Article |
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Gualandi, A. Zilio, Luca Dal Faranda, D. Mengaldo, G. |
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Gualandi, A. |
title |
Similarities and differences between natural and simulated slow earthquakes |
title_short |
Similarities and differences between natural and simulated slow earthquakes |
title_full |
Similarities and differences between natural and simulated slow earthquakes |
title_fullStr |
Similarities and differences between natural and simulated slow earthquakes |
title_full_unstemmed |
Similarities and differences between natural and simulated slow earthquakes |
title_sort |
similarities and differences between natural and simulated slow earthquakes |
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2024 |
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https://hdl.handle.net/10356/181622 |
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1819113012765655040 |