Faults become more and more responsive to stress perturbations as instability mounts. We utilize this property in order to identify the different phases of the seismic cycle. Our analysis provides new insights about the features of impending mainshocks, which are proposed to emerge from a large scale crustal-weakening preparation process whose duration depends on their seismic moments, according to the power-law T = M^1/3 for M < 10^19 N m. Moreover, further studies are performed about the impact of tidal stress perturbation on seismicity; in particular, the relationship between frequency magnitude scaling and perturbations is discussed, showing that the sensitivity of earthquakes to solid Earth tides decreases as their magnitudes increase.

Correlation between seismic activity and tidal stress perturbations highlights growing instability within the brittle crust / Zaccagnino, Davide; Telesca, Luciano; Doglioni, Carlo. - In: SCIENTIFIC REPORTS. - ISSN 2045-2322. - 12:(2022).

Correlation between seismic activity and tidal stress perturbations highlights growing instability within the brittle crust

Davide Zaccagnino
Primo
;
Carlo Doglioni
Ultimo
2022

Abstract

Faults become more and more responsive to stress perturbations as instability mounts. We utilize this property in order to identify the different phases of the seismic cycle. Our analysis provides new insights about the features of impending mainshocks, which are proposed to emerge from a large scale crustal-weakening preparation process whose duration depends on their seismic moments, according to the power-law T = M^1/3 for M < 10^19 N m. Moreover, further studies are performed about the impact of tidal stress perturbation on seismicity; in particular, the relationship between frequency magnitude scaling and perturbations is discussed, showing that the sensitivity of earthquakes to solid Earth tides decreases as their magnitudes increase.
tidal stress; earthquake triggering; seismic precursors
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Correlation between seismic activity and tidal stress perturbations highlights growing instability within the brittle crust / Zaccagnino, Davide; Telesca, Luciano; Doglioni, Carlo. - In: SCIENTIFIC REPORTS. - ISSN 2045-2322. - 12:(2022).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1630975
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