Deformation autowaves in fault zones

Kuzmin, Yu. O.

doi:10.1134/s1069351312010089

Cited by 56 publications

(32 citation statements)

References 5 publications

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“…Кузьмин [Kuz'min, 2012] считает существо вание двух типов волн: «межразломных» и «внутри разломных». По данным о поочередном проявлении деформационной активности в разломных зонах («межразломная» волна) Припятской впадины уста навливается пространственновременная миграция де формационных процессов со скоростью около 26 км/год (рис.…”

Section: деформационные волны в литосфере землиunclassified

“…Кузьмин [Kuz'min, 2012] полагает более ар гументированным явлением и обосновывает их генера цию параметрическим возбуждением (индуцировани ем) аномальных деформаций в зоне разлома. Аномаль ные деформационные процессы, регистрируемые в зо Рис.…”

Section: деформационные волны в литосфере землиunclassified

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Deformation waves as a trigger mechanism of seismic activity in seismic zones of the continental lithosphere

Шерман¹

2013

Geodyn. Tectonophys.

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Deformation waves as a trigger mechanism of seismic activity and migration of earthquake foci have been under discussion by researchers in seismology and geodynamics for over 50 years. Four sections of this article present available principal data on impacts of wave processes on seismicity and new data. The first section reviews analytical and experimental studies aimed at identification of relationships between wave processes in the lithosphere and seismic activity manifested as spaceandtime migration of individual earthquake foci or clusters of earthquakes. It is concluded that with a systematic ap proach, instead of using a variety of terms to denote waves that trigger seismic process in the lithosphere, it is reasonable to apply the concise definition of 'deformation waves', which is most often used in fact.The second section contains a description of deformation waves considered as the trigger mechanism of seismic activity. It is concluded that a variety of methods are applied to identify deformation waves, and such methods are based on various research methods and concepts that naturally differ in sensitivity concerning detection of waves and/or impact of the waves on seismic process. Epicenters of strong earthquakes are grouped into specific linear or arcshaped systems, which common criterion is the same time interval of the occurrence of events under analysis. On site the systems compose zones with similar time sequences, which correspond to the physical notion of moving waves (Fig. 9). Periods of manifestation of such waves are estimated as millions of years, and a direct consideration of the presence of waves and wave parameters is highly chal lenging. In the current stateoftheart, geodynamics and seismology cannot provide any other solution yet.The third section presents a solution considering record of deformation waves in the lithosphere. With account of the fact that all the earthquakes with М≥3.0 are associated with fault zones, a brief description of the method for assessment of spatial and temporal regularities in locations of earthquake epicentres in zones of dynamic influence of faults is provided. The method can be applied to estimate a dominating direction of movement of the epicentres, which corresponds to the phase velocity of the deformation wave disturbing metastability of the faultblock medium, leading to displacement of neigh bouring blocks and thus causing a seismic event (Fig. 14). By integration of vectors of migration of epicentres at active faults, it is possible to demonstrate a pattern of vectors of movements of the deformation waves in the seismic zones of the continental lithosphere (Fig. 18).Regional and transregional deformation waves are analyzed. For seismic zones of Central Asia, vectors of deformation waves are established, a scheme showing regional orientations of the waves is developed, and main wave parameters (length and time period) are estimated (Fig. 19). Three depth levels of deformation waves are distinguished: the whole lithosphere, the upper brittle ...

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Section: деформационные волны в литосфере землиunclassified

Deformation waves as a trigger mechanism of seismic activity in seismic zones of the continental lithosphere

Шерман¹

2013

Geodyn. Tectonophys.

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“…The direct methods exploring temporal variations of crustal deformation comprise the deformographic (Kasahara, 1979;Ishii et al, 1983;Nevskii et al, 1987;Bella et al, 1990;Harada et al, 2003), hydrogeodynamic (Barabanov et al, 1988;Kissin, 2008) and geodetic measurements (Kuz'min, 2012), including the methods of deformation measurements using laser ranging (Milyukov et al, 2013) and GPS observations (Reuveni et al, 2014;Yoshioka et al, 2015).…”

Section: Methods For Detection Of Slow Strain Wavesmentioning

confidence: 99%

“…By now, the deformographic, geodetic and hydrological measurements performed worldwide have revealed the migration of deformations at velocities of about 10-100 km yr −1 and 1-10 km day −1 (Kasahara, 1979;Bella et al, 1990;Harada et al, 2003;Kuz'min, 2012;Reuveni et al, 2014;Yoshioka et al, 2015). Migration of earthquake epicenters coincides with the velocity (10-100 km yr −1 ) and direction of crustal deformation movement (Kasahara, 1979;Barabanov et al, 1988) and with hydrological effects (Kissin, 2008).…”

Section: Introductionmentioning

confidence: 99%

Slow strain waves in blocky geological media from GPS and seismological observations on the Amurian plate

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Trofimenko

2016

Nonlin. Processes Geophys.

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Abstract. Based on the statistical analysis of spatiotemporal distribution of earthquake epicenters and perennial geodetic observation series, new evidence is obtained for the existence of slow strain waves in the Earth. The results of our investigation allow us to identify the dynamics of seismicity along the northern boundary of the Amurian plate as a wave process. Migration of epicenters of weak earthquakes (2 ≤ M ≤ 4) is initiated by the east-west propagation of a strain wave front at an average velocity of 1000 km yr −1 . We have found a synchronous quasi-periodic variation of seismicity in equally spaced clusters with spatial periods of 3.5 and 7.26 • comparable with the length of slow strain waves. The geodetic observations at GPS sites in proximity to local active faults show that in a number of cases, the GPS site coordinate seasonal variations exhibit a significant phase shift, whereas the time series of these GPS sites differ significantly from a sinusoid. Based on experimental observation data and the developed model of crustal block movement, we have shown that there is one possible interpretation for this fact that the trajectory of GPS station position disturbance is induced by migration of crustal deformation in the form of slow waves.

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“…Тектоническая сила, о которой говорит оппо-нент в первом предложении своего отзыва, здесь совершенно не причем -в рамках ротационного подхода используется концепция движения геосре-ды [Kuz'min, 2012]. Напряжения, возникающие во-круг блоков геосреды, также не являются некими дополнениями к чему-то, как утверждает оппонент, они -первичные, основные.…”

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Plate Tectonics and Geodynamics of Rotating Block Medium: Reply to YU.L. Rebetsky's Comment on “Geodynamics as Wave Dynamics of the Medium Composed of Rotating Blocks” by А.V. Vikulin [Geodyn. Tectonophys., 2015, 6 (3), 345–364]

Викулин¹

2016

Geodin. tektonofiz.

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Deformation autowaves in fault zones

Cited by 56 publications

References 5 publications

Deformation waves as a trigger mechanism of seismic activity in seismic zones of the continental lithosphere

Deformation waves as a trigger mechanism of seismic activity in seismic zones of the continental lithosphere

Slow strain waves in blocky geological media from GPS and seismological observations on the Amurian plate

Plate Tectonics and Geodynamics of Rotating Block Medium: Reply to YU.L. Rebetsky's Comment on “Geodynamics as Wave Dynamics of the Medium Composed of Rotating Blocks” by А.V. Vikulin [Geodyn. Tectonophys., 2015, 6 (3), 345–364]

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