A deformation method for determining the tsunami potential of earthquakes

Долгих, Г. И.; Долгих, С. Г.; Kovalev, S. G.; Чупин, В. А.; Швец, В. А.; Yakovenko, S. V.

doi:10.1134/s1028334x07080296

Cited by 11 publications

(4 citation statements)

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“…For example, the monitoring of signals in real time can allow the implementation of early warning procedures for tsunami waves caused by strong geodynamic processes. As shown in (Dolgikh et al, 2007), when the earthquake source region was more than 5,500 km away from the receiving system, the deformation anomaly, an indicator of tsunami generation (Dolgikh and Dolgikh, 2021), was detected after 19 min 54 s. At the same time, the tsunami reached the nearest coast after 2 h. A recording from an instrument at such a distance from the tsunami source would have provided a warning of a large wave hazard in about 1 h and 25 min. Similar instruments operating close to earthquake-prone areas could have given warnings much earlier.…”

Section: Figurementioning

confidence: 95%

Inter-geosphere interaction in the infrasonic range

Dolgikh,

Budrin,

Dolgikh

et al. 2023

Front. Earth Sci.

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On the basis of experimental data from laser strainmeters, a laser nanobarograph, and a laser meter of hydrosphere pressure variations, we studied inter-geosphere interaction in microseismic range (2–20 s) and in minute range (4–17 min). We established general patterns of transformation of the Earth’s crust upper layer oscillations into atmospheric oscillations, and atmospheric oscillations—into oscillations of the Earth’s crust upper layer in the specified ranges. Besides, we show that transformation coefficient has seasonal dependence, associated with different elastic characteristics of the Earth’s crust upper layer in winter and summer due to negative winter temperatures and high positive summer temperatures, and also different moisture saturation of the soils.

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Section: Figurementioning

confidence: 95%

Inter-geosphere interaction in the infrasonic range

Dolgikh,

Budrin,

Dolgikh

et al. 2023

Front. Earth Sci.

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“…For the first time period, a deformation anomaly was recorded during the registration of a tsunamigenic earthquake, the laser strainmeter of which showed the form of a deformation jump that occurred after the earthquake started [13]. Later, this result was generalized in [14] and the deformation methods used for determining the tsunamigenic nature of earthquakes were based on it. The potential of this method is associated with the fact that its development will allow the nature of the movement of the Earth's crust to be determined remotely at planetary distances, which sets in motion huge masses of water that degenerate into tsunamis during their development.…”

Section: Introductionmentioning

confidence: 99%

Deformation Anomalies Accompanying Tsunami Origination

Долгих

2021

JMSE

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Basing on the analysis of data on variations of deformations in the Earth’s crust, which were obtained with a laser strainmeter, we found that deformation anomalies (deformation jumps) occurred at the time of tsunami generation. Deformation jumps recorded by the laser strainmeter were apparently caused by bottom displacements, leading to tsunami formation. According to the data for the many recorded tsunamigenic earthquakes, we calculated the damping ratios of the identified deformation anomalies for three regions of the planet. We proved the obtained experimental results by applying the sine-Gordon equation, the one-kink and two-kink solutions of which allowed us to describe the observed deformation anomalies. We also formulated the direction of a theoretical deformation jump occurrence—a kink (bore)—during an underwater landslide causing a tsunami.

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“…It is shown in paper [1] that only application of spatially separated laser strainmeters will allow to solve a problem of the short-term prediction of crustal earthquakes. And application of laser strainmeters in services of the prevention tsunami threat, based on a deformation method for degree assessment of tsunamigenic earthquakes [2], will allow not only to determine from 100% probability tsunami formation after an underwater earthquake, but also to calculate its power. To solve these problems in full is necessary to measure displacement of the earth's crust in different directions.…”

Section: Introductionmentioning

confidence: 99%

Studying of Deformation Processes by Two-Coordinate Laser Strainmeter

Долгих¹

2013

IJCCE

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The results of experimental data processing of a two-coordinate laser strainmeter are discussed. The two-coordinate laser strainmeter consists of two laser strainmeters which measuring shoulders are oriented along the lines "North-South" and "West-East". Measurement accuracy of the earth's crust microdisplacements of these devices makes 0 to1 nm. Working frequency range is from 0 to 1000 Hz. Processing experimental data the main attention is paid to high tides, natural oscillations of the Earth, natural oscillations of geoblocks, superficial sea waves. It is established that after separate earthquakes the natural oscillations of regional geoblocks are strongly excited. Besides, it is revealed that quasiperiodic fluctuations of crust in the range of periods from 1 to 12 min. are caused by atmospheric processes. Besides, it is revealed that quasiperiodic oscillations of the earth's crust in the range of periods from 1 to 12 minutes are caused by atmospheric processes.

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A deformation method for determining the tsunami potential of earthquakes

Cited by 11 publications

References 0 publications

Inter-geosphere interaction in the infrasonic range

Inter-geosphere interaction in the infrasonic range

Deformation Anomalies Accompanying Tsunami Origination

Studying of Deformation Processes by Two-Coordinate Laser Strainmeter

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