Global changes in the seismic regime and water surface level of the earth

Ulomov, V. I.

doi:10.1134/s1069351307090017

Cited by 4 publications

(2 citation statements)

References 5 publications

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“…Historically, it is known that strong earthquakes with magnitude (M) > 7.0 occur on the southern, western, North Caucasus [9,18]. According to the researchers, the strong earthquakes that occurred on the western side of the Caspian Sea (East Caucasus), on the Absheron Peninsula, in the Turkmenbashi and Greater Balkhan regions correspond to deep faults in the places where two continental-type lithospheric blocks collided The oceanic crust has already subducted in these areas, and the microcontinental plates pushing it from the south to the north collided with the Scythian-Turanian platform.…”

Section: Seismicity Of the Studied Regionmentioning

confidence: 99%

Complex analysis of the geodynamic conditions of the Absheron-Balkhan oil and gas zone

Sadigova,

Zamanova,

Hasanov

2024

IJCESEN

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The Absheron-Balkhan oil and gas area is located in the contact zone of the Scythian-Turanian platform with the South Caspian basin (SCB). In recent years, in addition to theoretical considerations, scientists have conducted a number of geophysical studies to determine the structure of sediment cover in the South Caspian Basin. The information obtained about the depth structure has formed a new idea about the formation of the South Caspian basin. The purpose of the work is to study the features of geodynamics of the zone of the junction of the South Caspian basin and the Scythian-Turanian epi-Hercynian platform. The research methodology combines a complex analysis of geological, seismological, geomorphological, and geodetic data on the studied area. Geological and geophysical data in particular on regional profiles were used to link earthquakes to specific geological structures. The South Caspian Basin is surrounded by active mountain zones on all sides. The Kopeh Dagh, Alborz, and Talysh mountains, which connect the eastern, southern, and western sides of the basin, are observed with earthquakes not deeper than 30 km. In contrast, earthquakes were observed in the Absheron-Balkhan threshold, which covers the northern part of the basin, at depths greater than 30 km. Tectonically, the Absheron-Balkhan threshold is located at the junction of the South Caspian oceanic crust and the epi-Hercynian Scythian- Turanian continental crust. Seismic events, mainly in the northern part of the South Caspian Basin are necessary to study the geodynamic conditions of this area, and to determine the causes of earthquakes. It was observed that the strongest and deepest earthquakes, as well as tectonic processes, occurred in the northern flank of the South Caspian Basin, in the Absheron-Balkhan fold zone, and in the pre-platform area. Analysis of the focal mechanisms and depths of earthquakes proves that they are not specific to collision structures. The high seismic activity of the study area, the observation of crustal deformations at the edges of the basin (based on GPS data), and the development of mud volcanism indicate that the geodynamic conditions of the basin are active. Analysis of the seismic events data shows that the subduction of the oceanic crust of the SCB in the zone of the Absheron threshold under the continental crust of the Scythian- Turanian is the main geological event that caused seismic activity in modern times. KEYWORDS: Absheron-Balkhan fold zone, geodynamic conditions, South Caspian Basin, earthquake, deep structure.

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Section: Seismicity Of the Studied Regionmentioning

confidence: 99%

Complex analysis of the geodynamic conditions of the Absheron-Balkhan oil and gas zone

Sadigova,

Zamanova,

Hasanov

2024

IJCESEN

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“…At present, numerous works devoted to both global and regional aspects of seismicity have been published. The most popular aspects are the relationship between seis micity and solar activity (Sytinskii, 1973(Sytinskii, , 1989Sidorin, 2004; dependence of global seismicity on the position of celestial bodies, in particular, the Moon (Knopoff, 1970;Khomutov, 1995); annual and seasonal periodicities of global and local seismicity (Deshcher evskaya Sidorin, , 2010Sidorin, , 2012Sidorin, , 2013Levin, Sasorova, and Zhuravlev, 2005;Ulomov, 2007aUlomov, , 2007bBurmin, 2007Burmin, , 2011; and others (for example, see (Levin, Rodkin, and Sasorova, 2007)). All these studied are aimed mostly at prediction and in less degree at research of geodynamics.…”

Section: Introductionmentioning

confidence: 99%

Some seismicity regularities of the Caucasus

et al. 2014

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Some aspects of the seismicity the Caucasus are considered based on the earthquake catalog from 1962 to 2011, which includes data on about 40000 seismic events with magnitudes from -1.0 to 7.5. Corre lation equations between the energy classes and magnitudes of the earthquakes are calculated. Interannual changes in the Gutenberg-Richter relationship and seasonal cycles of seismic energy release are revealed.

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