Results of Seismological Monitoring in the Baltic Sea and Western Part of the Kaliningrad Oblast Using Bottom Seismographs

Ковачев, С. А.; Крылов, А. Л.

doi:10.1134/s1069351323020076

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…It is of great significance for many geotechnical engineers to be able to accurately identify and locate the fracture location and range in rock [1]. Early warning of failure through some precursory indicators is conducive to monitoring, early warning, and prevention of engineering disasters like rock bursts [2,3], roof falls [4,5], slope slips [6,7], structure reveals [8,9], and even earthquakes [10,11]. In the process of rock fracture, various energy releases will be generated [12], including thermal energy, kinetic energy, friction energy, stress wave energy, etc.…”

Section: Introductionmentioning

confidence: 99%

Waveform Complexity and Positioning Analysis of Acoustic Emission Events during the Compression Failure Process of a Rock Burst Prone Sample

Zhang,

Yu,

et al. 2024

Buildings

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The localization results of acoustic emission (AE) events can reflect the location and pattern of burst-prone rock failures. However, event localization heavily depends on the quality of the original waveform of the sensor. Therefore, this study analyzed the AE waveform of a rock sample under compression to evaluate its failure localization and quality. From the research results, it could be seen that the initial failure was relatively calm, with clear take-off points, which can be better used for accurate AE event positioning. However, the later failure was severe, causing the take-off points of most sensors to be very unclear, and positioning methods that rely on take-off points cannot be used for positioning, let alone simply using the positioning results of the built-in software. This research result reminds researchers who use AE signals for event localization to first examine the quality and status of the original waveform, providing a basis for obtaining accurate localization results, in order to further accurately study the subsequent failure patterns. The above facts indicate that the initial failure is small and scattered, while the later failure is large and concentrated, with certain fractal characteristics.

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Section: Introductionmentioning

confidence: 99%

Waveform Complexity and Positioning Analysis of Acoustic Emission Events during the Compression Failure Process of a Rock Burst Prone Sample

Zhang,

Yu,

et al. 2024

Buildings

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show abstract

“…The design and construction of offshore oil and gas production facilities, such as oil platforms, marine terminals, and underwater pipelines, require accurate seismic hazard assessment, including seismological monitoring to study the natural seismic regime of the region [14] and seismic microzoning to assess the contribution of local conditions to the level of possible seismic impact [15]. For critical objects, seismological monitoring is also necessary during their operation, such as for oil and gas production facilities, since, due to the extraction of large volumes of oil and gas, the natural tectonic balance in the Earth's crust is disrupted, which can lead to the activation of seismic processes [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Features of Seismological Observations in the Arctic Seas

Krylov,

Novikov,

Kovachev

et al. 2023

JMSE

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This paper is devoted to the features of seismological observations in the Arctic seas, which are complicated by harsh climatic conditions, the presence of ice cover, stamukhi and icebergs, and limited navigation. Despite the high risk of losing expensive equipment, the deployment of local networks of bottom seismographs or stations installed on ice is still necessary for studying the seismotectonic characteristics and geodynamic processes of the region under consideration, the deep structure of the crust and upper mantle, seismic hazards, and other marine geohazards. Various types of seismic stations used for long-term and short-term deployments in the Russian sector of the Arctic Ocean, as well as various schemes and workflows for their deployment/recovery, are described. The characteristics of seafloor seismic noise and their features are also considered. The results of deployments demonstrate that the characteristics of the stations make it possible to reliably record earthquake signals and seismic noise. Based on the experience gained, it was concluded that the preferred schemes for deploying ocean-bottom seismographs are those in which their subsequent recovery does not depend on their power resources. Usually, such schemes allow for the possibility of dismantling stations via trawling and are suitable for the shelf depths of the sea. The advantages of such schemes include the possibility of installing additional hydrophysical and hydrobiological equipment. When using pop-up ocean-bottom seismographs, special attention should be paid to the careful planning of the recovery because its success depends on the possibility of a passage to the deployment site, which is not always possible due to changing meteorological and ice conditions. Seismic records obtained on the seafloor are characterized by a high noise level, especially during periods of time when there is no ice cover. Therefore, it is recommended to install bottom stations for periods of time when ice cover is present. The frequency range of the prevailing noise significantly overlaps with the frequency range of earthquake signals that must be taken into account when processing bottom seismic records.

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Results of Seismological Monitoring in the Baltic Sea and Western Part of the Kaliningrad Oblast Using Bottom Seismographs

Cited by 2 publications

References 8 publications

Waveform Complexity and Positioning Analysis of Acoustic Emission Events during the Compression Failure Process of a Rock Burst Prone Sample

Waveform Complexity and Positioning Analysis of Acoustic Emission Events during the Compression Failure Process of a Rock Burst Prone Sample

Features of Seismological Observations in the Arctic Seas

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