Tidal wave period and seismicity

Morgounov, V. A.; Boyarsky, E. A.; Stepanov, M. V.

doi:10.1134/s1028334x06010272

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…It is known that significant interaction of the tidal forces on the EQ origination was noticed generally for the shallow events (Tanaka et al, 2002;Cochran et al, 2004). Moreover it was shown that weak but long-period influences of tidal forces are more effective than several times more powerful influence of short-period tidal forces (Morgounov et al, 2005(Morgounov et al, , 2006. It is evidently, that composite geological medium which is characterized by nonlinear parameters and nonuniform structure, does not give simple and prompt response to an external forcing.…”

Section: Discussionmentioning

confidence: 99%

Latitudinal distribution of earthquakes in the Andes and its peculiarity

Левин

Sasorova

2009

Adv. Geosci.

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In the last decade, there has been growing interest in problems related to searching global spatiotemporal regularities in the distribution of seismic events on the Earth. The worldwide catalogs ISC were used for search of spatial and temporal distribution of earthquakes (EQ) in the Pacific part of South America. We extracted all EQ from 1964 to 2004 with Mb>=4.0. The total number of events under study is near 30 000. The entire set of events was divided into six magnitude ranges (MR): 4.0<=Mb<4.5; 4.5<=Mb<5.0; 5.0<=Mb<5.5; 5.5<=Mb<6.0; 6.0<=Mb<6.5; and 6.5<=Mb. Further analysis was performed separately for each MR. The latitude distributions of the EQ number for all MR were studied. The whole region was divided in several latitudinal intervals (size of each interval was either 5° or 10°). The number of events in each latitudinal interval was normalized two times. After normalization we obtained the relative seismic event number generated per one kilometer of plate boundary. The maximum of seismic activity in the Pacific part of the South America is situated in latitude interval 20°–30° S. The comparative analysis was executed for the latitude distributions of the EQ number and the EQ energy released. Then the distributions of EQ hypocenter location in latitude and in depth were studied. The EQ sources for the high latitudes (up to 35° S) are located on the depth (H) between 20–80 km. It was shown, that full interval of depth in each latitudinal belt generally divides into three parts (clusters) with close-cut separation boundaries (K1 – with 0<H<=80 km, K2 – with 120<H<=240 km and K3 – with H>=500 km)

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Section: Discussionmentioning

confidence: 99%

Latitudinal distribution of earthquakes in the Andes and its peculiarity

Левин

Sasorova

2009

Adv. Geosci.

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“…Analysis of the tide influence on the seismic process fulfilled in the work (Morgounov et al, 2006) showed that the trigger effect of the tidal periodic components on earthquake occurrence depends on the period of the tidal component. It was revealed that tidal component SSa (182.62 days), month component MM (27.55 days), and semi-month component MSF (14.77 days) manifested the statistical significance of the connection between the tidal phases and the earthquake occurrence.…”

Section: The Tidal Forces Contribution In the Seismic Processmentioning

confidence: 99%

Zonal concentration of some geophysical process intensity caused by tides and variations in the Earth's rotation velocity

2014

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Abstract. We analyzed what kind of fundamental physical phenomena can be responsible for the generation of the anomalous latitudinal zones of the seismic activity, and the hotspots, and some other geophysical processes. The assessment of tidal effect contribution to the earthquake preparation process is discussed. A disk model of the Earth's rotation was proposed. The model is acceptable for the homogeneous Earth and for the heterogeneous one. The disk model explains the nucleation of two maximums of the gradient of the moment of inertia over latitude with respect to the Equator. Effects of the variations in the Earth's rotation angular velocity were estimated and the possible features caused by the rotation velocity instability were described. The variations in the relative velocity of the Earth's rotation (dimensionless value ν ≈ (T − P)/P) are approximately equal upon the average to 10−8, where T is the observed length of day for the Earth, and P is the astronomical day. These variations lead to the occurrence of the additional energy estimated as 1020 J. The authors proposed the hypothesis of a pulsating geoid based on effects of the Earth's rotation features, and tidal forces, and conception of critical latitudes in the solid Earth. This hypothesis may highlight the phenomenon of zonal intensification of some geological processes in the solid Earth (the seismic activity, and hotspot location, and major ore deposit locations).

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The problem of the occurrence of neutrons of terrestrial origin during seismic wave travel

Volodichev

Левин

2012

Moscow Univ. Phys.

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Tidal wave period and seismicity

Cited by 3 publications

References 5 publications

Latitudinal distribution of earthquakes in the Andes and its peculiarity

Latitudinal distribution of earthquakes in the Andes and its peculiarity

Zonal concentration of some geophysical process intensity caused by tides and variations in the Earth's rotation velocity

The problem of the occurrence of neutrons of terrestrial origin during seismic wave travel

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