Changes in the dynamics of seismic process observed in the fixed time windows; case study for southern California 1980–2020

Matcharashvili, Teimuraz; Czechowski, Zbigniew; Chélidzé, T.; Zhukova, Natalia

doi:10.1016/j.pepi.2021.106783

Cited by 1 publication

(2 citation statements)

References 45 publications

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“…Of course, this means that the local dam effect is mixed with regional seismic events, which makes the influence of the former less obvious. The same results were obtained in the analysis of waiting times using Mahalanobis distance analysis [ 60 ]. It is interesting that in the time patterns of the fault strain rate ( Figure 14 ) and weak seismicity ( Figure 16 ) we can mark out three different periods: initial (constant strain rate of the fault and weak order in the seismic regime), transitional during initial lake filling (the increase in disorder in the seismic regime) and stable (close to periodic change in strain rate and high ordering of EQ waiting times).…”

Section: Resultssupporting

confidence: 72%

“…As we showed earlier, such an effect is explained by a nonlinear response of the system to a weak periodic forcing [ 13 ]. Examples of such strong synchronization effects caused by weak forcing in the laboratory and nature are plenty: besides the reservoir periodic loading considered above [ 32 , 52 , 55 ], synchronization of EQs can be due to the impact of strong electromagnetic pulses, Earth tides and teleseismic waves from strong remote EQs [ 50 , 60 , 61 , 62 ].…”

Section: The Effect Of Weak Forcing Of Different Origin On the Dynami...mentioning

confidence: 99%

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Complexity in Geophysical Time Series of Strain/Fracture at Laboratory and Large Dam Scales: Review

Chélidzé

Matcharashvili

Mepharidze

et al. 2023

Entropy

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One of the interesting directions of complexity theory is the investigation of the synchronization of mechanical behavior of large-scale systems by weak forcing, which is one of manifestations of nonlinearity/complexity of a system. The effect of periodic weak mechanical or electromagnetic forcing leading to synchronization was studied on the laboratory load–spring system as well as on a big dam’s strain data. Due to synchronization, the phase space structure of the forced system strongly depends on the weak forcing intensity–determinism show itself in the recurrence of definite states of the forced system. The nonlinear dynamics of tilts/strains/seismicity near grand dams reflect both the complexity of the mentioned time series, connected with the natural agents (regional and local geodynamics), which were presented even before dam erection, as well as the effects of the water level (WL) variation in the reservoir, which is a quasi-periodic forcing superimposed on the natural geodynamic background. Both these effects are documented by the almost half-century of observations at the large Enguri Dam. The obtained data on the dynamics of strain/seismicity near a large dam can be used for the assessment of the possible risks, connected with the abrupt change of routine dynamics of construction.

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Section: Resultssupporting

confidence: 72%

Section: The Effect Of Weak Forcing Of Different Origin On the Dynami...mentioning

confidence: 99%

Complexity in Geophysical Time Series of Strain/Fracture at Laboratory and Large Dam Scales: Review

Chélidzé

Matcharashvili

Mepharidze

et al. 2023

Entropy

Self Cite

View full text Add to dashboard Cite

show abstract

Changes in the dynamics of seismic process observed in the fixed time windows; case study for southern California 1980–2020

Cited by 1 publication

References 45 publications

Complexity in Geophysical Time Series of Strain/Fracture at Laboratory and Large Dam Scales: Review

Complexity in Geophysical Time Series of Strain/Fracture at Laboratory and Large Dam Scales: Review

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