An Analysis of Ground Movements and Deformations from 13-Year GPS Observations before and during the July 2019 Ridgecrest, USA Earthquakes

Кафтан, В. И.

doi:10.1134/s0742046321010115

Cited by 5 publications

(4 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The experience of similar studies has shown that a minimum of internal displacements accumulates before strong earthquakes in the area of their epicenter [Kaftan, 2021;. We consider this characteristic as a predictor of the location of a future earthquake as a place that impedes general movement.…”

Section: Deficit Of Internal Movements Due To Strong Earthquakesmentioning

confidence: 99%

Co- and Pre-Seismic Crustal Deformations Related to Large Earthquakes Between Years of 2009 and 2023 Using Continuous CORS-TR GNSS Observations in the Anatolian Diagonal (Turkey)

Dokukin,

Guvenaltin,

Kaftan

et al. 2023

Russian Journal of Earth Sciences

View full text Add to dashboard Cite

Synoptic animations of internal displacements and deformations of the earth's crust were obtained based on the results of continuous GNSS observations in Eastern Anatolia from 2009 to 2023. The spatiotemporal patterns of the seismic deformation process in connection with the tectonics of the region have been identified. It is shown that dilatation and total shear strains evolve in concert with the migration of the strongest earthquakes Elazig, Elazig-Malatya and devastate Karamanmaraş series. Two years before the occurrence of the devastating earthquakes of 2023, a deficit of internal displacements of GNSS stations developed in the area of their epicenters. The conducted research suggests that the strongest events of 2009-2023 are connected by a unitary seismic deformation process. The most important action in this case is the SW movement of the Anatolian block as monolithic element. In the development of movements and deformations, a flow of increasing stresses is observed in the direction from Karliova Triple Junction to the SW to the area of the strongest seismic events on 02.2023. It originates east of the Karliova Triple Junction where the Arabian Plate encounters an obstacle. The role of mantle flows in the seismic process is assessed

show abstract

Section: Deficit Of Internal Movements Due To Strong Earthquakesmentioning

confidence: 99%

Co- and Pre-Seismic Crustal Deformations Related to Large Earthquakes Between Years of 2009 and 2023 Using Continuous CORS-TR GNSS Observations in the Anatolian Diagonal (Turkey)

Dokukin,

Guvenaltin,

Kaftan

et al. 2023

Russian Journal of Earth Sciences

View full text Add to dashboard Cite

show abstract

“…Direct indications of strain waves include wave fluctuations of the ground water level; migration of slopes and strain at the surface. Direct methods studying temporal variations of crustal strain involve deformographic [4] [6] [107] [110] [117] [118] [119], hydrogeodynamic [11] [12] and geodetic measurements [7] [33] [86], including methods of strain measurements using laser long ranging [120] and data from continuous GPS observations [10] [121].…”

Section: Indirect and Direct Observations Of Strain Waves In The Earthmentioning

confidence: 99%

Slow Strain Waves: Models and Observations, a Review

Быков¹

2023

IJG

View full text Add to dashboard Cite

The theoretical discovery of slow strain (tectonic) waves, the so-called strain waves in the Earth, served as a motivation to develop physical backgrounds of the mathematical theory of propagation of these waves and to search for methods of their experimental detection. For fifty years, scientists from different countries in different regions of the Earth, using direct and indirect methods, discovered the migration of crustal deformation and revealed its wave nature, and, therefore, proved the reality of the existence of strain waves of the Earth. This overview briefly describes the history of the development of the concept of strain waves on the Earth, the observation methods and properties of strain waves, and the main types of geological structures generating these waves. The most prominent results of the theoretical, laboratory, and in-situ observations of slow strain migration, including slow earthquakes and periodic Episodic Tremor and Slow (ETS) slip effects, are presented. In the near future, studies of slow strain waves may lead to a fundamental revision of the current concepts about the physics of the seismic process.

show abstract

“…Применение локальной (внутренней) системы отсчета по отношению к накоплению смещений стан ций ГНСС позволяет обнаруживать зоны минимальных взаимных смещений. Эти зоны маркируют места локально неподвижных участков земной поверхности, характерные для запертых зон сейсмогенерирующих разломов [Kaftan, 2021;. Выявление дефицита смещений на сейсмогенерирующих разломах осуществляется разными авторами с целью установления его наиболее сейсмоопасных участков [Jiang et al, 2015;Wang et al, 2021].…”

Section: выявление «запертой» зоны в окрестности образования очага гл...unclassified

“…Значительный интерес представляет факт практически полного отсутствия значимых деформаций на протяжении семи лет перед сильными землетря сениями Кумамото 2016 г. Как было отмечено выше, в области подготовки сильных сейсмических событий в зоне контакта СевероАмериканской и Тихоокеан ской тектонических плит за месяцы и годы до таковых возникают явно выраженные деформационные неоднородности [Kaftan, Melnikov, 2017, 2019. В случае с серией Кумамото подобных аномалий не обнаружено.…”

Section: дискуссия и заключениеunclassified

Long-term changes in crustal movements and deformations before and during the 2016 Kumamoto earthquake sequence

Кафтан

Tatarinov

Shevchuk

2022

Geodin. tektonofiz.

View full text Add to dashboard Cite

The Kyushu Island, as well as whole Japanese archipelago, is equipped with dense GPS network (GEONET). It allows us to track the movements and deformations of the earth’s surface over long-term time intervals. In this study, based on daily determinations of the coordinates of GPS stations, analysis has been made on long-term trends in the accumulation of movements and deformations in large areas of the Kyushu Island before the series of April 14–16, 2016 Kumamoto earthquakes to identify deformation precursors and locked, immobile fault zones. The study of the seismic deformation process was performed using the data from 70 continuous permanent GPS stations for the period 2009–2016.The movement and deformation features found characterize the kinematics of the axial zone of the southwestern part of the island arc of the Japanese archipelago. The combination of coseismic compression and uplift in the center of the formed triad of deformation extrema and the consistency between subsidence and extensions at its edges demonstrate the mechanism of growth of the central region of the island arc under compression and the role of volcanism. Of particular interest in the context of the development of movements and deformations during the generation of the Kumamoto earthquakes is the behavior of the minimum displacement moduli of the GNSS sites. Analysis of their kinematics shows the formation of a zone of minimum displacements, in which subsequent strong seismic events were localized. It is shown that rather dense and extensive GNSS networks allow observing and studying the seismic-deformation process at the stages of seismic generation, discharge and relaxation, thereby providing an empirical basis for the development of models for predicting large seismic events.

show abstract

An Analysis of Ground Movements and Deformations from 13-Year GPS Observations before and during the July 2019 Ridgecrest, USA Earthquakes

Cited by 5 publications

References 17 publications

Co- and Pre-Seismic Crustal Deformations Related to Large Earthquakes Between Years of 2009 and 2023 Using Continuous CORS-TR GNSS Observations in the Anatolian Diagonal (Turkey)

Co- and Pre-Seismic Crustal Deformations Related to Large Earthquakes Between Years of 2009 and 2023 Using Continuous CORS-TR GNSS Observations in the Anatolian Diagonal (Turkey)

Slow Strain Waves: Models and Observations, a Review

Long-term changes in crustal movements and deformations before and during the 2016 Kumamoto earthquake sequence

Contact Info

Product

Resources

About