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- W4378637318 abstract "Coda in local earthquake exhibits resonance-like wave behaviour where the coda emerges as long-duration small-amplitude vibration with selective frequency, slow temporal decay, and uniform spatial energy distribution around the earthquake source. Coda is thought to be the incoherent waves scattered from random small-scale heterogeneity in the earth's lithosphere. Here I show that the coda is primarily attributed to the natural resonance in strong small-scale heterogeneity around the earthquake's hypocenter through seismic wave field modeling for 1D heterogeneity. The natural resonance is evolved from the low frequency resonance (LFR) in transient regime and is an emergent phenomenon that occurs in steady state regime. Its resonance frequency decreases with increasing heterogeneous scale, impedance contrast, or random heterogeneous scale and velocity fluctuations; its intensity diminishes with decreasing impedance contrast or increasing random heterogeneous scale and velocity fluctuations." @default.
- W4378637318 created "2023-05-30" @default.
- W4378637318 creator A5049782471 @default.
- W4378637318 date "2015-08-20" @default.
- W4378637318 modified "2023-09-27" @default.
- W4378637318 title "Origin of coda waves: earthquake source resonance" @default.
- W4378637318 doi "https://doi.org/10.48550/arxiv.1508.04873" @default.
- W4378637318 hasPublicationYear "2015" @default.
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