The implementation of information system elements for interpreting integrated geophysical observations in Kamchatka

Копылова, Г. Н.; Ivanov, V. Y.; Касимова, В. А.

doi:10.2205/2009es000329

Cited by 7 publications

(3 citation statements)

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“…In both cases, the same methods of processing the observational data were used, including the following activities: The processing of the observational data in well YuZ-5 and construction of time series (for examples, see Figures 2, 3 and 4a, Figures 5b, 3.1 and 7) were carried out using the POLYGON Information System [59], which includes the database for the entire observation time, a program to compensate for barometric variations in the water level/pressure changes [38,40], as well as an interactive graphical interface.…”

Section: Seismo-hydrogeodynamic Effectsmentioning

confidence: 99%

Seismo-Hydrogeodynamic Effects in Groundwater Pressure Changes: A Case Study of the YuZ-5 Well on the Kamchatka Peninsula

Копылова

Болдина

2023

Water

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Seismo-hydrogeodynamic effects (SHGEs) in groundwater level (pressure) variations in a range of periods from minutes to hours and days during local and teleseismic earthquakes were considered based on the data of precision observations in a deep piezometric well located in a seismically active region. With the use of the tidal analysis and frequency dependence of the barometric response of the water level, a static confined response of groundwater pressure in a range of periods from hours to the first tens of days was established. The annual water level trend was characterized by the seasonal function of a hydrostatic head change in the well. In the groundwater pressure, changes were detected due to several types of seismo-hydrogeodynamic effects: 1—the coseismic fluctuations during the first tens of seconds and minutes after the arrival of seismic waves from the earthquakes with magnitudes of 5.3–9.1 at epicentral distances of 80–700 km; 2—the supposed hydrogeodynamic precursors of the two strongest events; 3—the four types of variations under the vibration impact of seismic waves from Mw = 6.8–9.1 earthquakes at epicentral distances of 80–14,600 km. The dependence of the distinguished types of SHGEs on the earthquake parameters, the intensity of the seismic impact in the well area and the amplitude-frequency composition of seismic waves were considered.

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Section: Seismo-hydrogeodynamic Effectsmentioning

confidence: 99%

Seismo-Hydrogeodynamic Effects in Groundwater Pressure Changes: A Case Study of the YuZ-5 Well on the Kamchatka Peninsula

Копылова

Болдина

2023

Water

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“…For all four statistical parameters, daily GRD files were created, representing tables of their values at the nodes of a regular grid of 50 × 50 nodes in size, covering the area in the latitude range of 50-64 N and in the longitude range of 155-168 E for the entire observation period. The distribution of each noise statistic over the territory, obtained by interpolating the median values of the parameters from the three stations closest to each node of the grid, was reflected on digital maps created using a geographic information system [44].…”

Section: Visualization Of the Seismic Noise Parameters Distributionmentioning

confidence: 99%

Variability in the Statistical Properties of Continuous Seismic Records on a Network of Stations and Strong Earthquakes: A Case Study from the Kamchatka Peninsula, 2011–2021

Kopylova,

Kasimova,

Lyubushin

et al. 2022

Prime Archives in Applied Sciences

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“…Based on the long-term detailed observations of water level variations in the SW-5 well, we identified four types of HGSV arising under the action of seismic waves emitted from the sources of the strong local and remote earthquakes. It has been possible to achieve this result due to the persistent continuity and high accuracy of water level measurements during a long period of time and due to using the specialized software products of the POLYGON Information System (Kopylova et al, 2009) and DIMAS data processing and visualization program (Droznin and Droznina, 2010), which are suitable for analyzing water level changes within a wide time span (from minutes to days and months) and for comparing the identified HGSV with the time of arrival of various groups of seismic waves.…”

Section: Hgsv Typification and Its Validitymentioning

confidence: 99%

Effects of Seismic Waves in Water Level Changes in a Well: Empirical Data and Models

Копылова

Болдина

2020

Izv., Phys. Solid Earth

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The high-precision water level measurements with a sampling interval of 5-10 min were carried out in 1996-2017 in the YuZ-5 well, Kamchatka. In the obtained time series, water level variations caused by the passage of seismic waves (hydrogeoseismic variations-HGSV) during 19 earthquakes with М w = 6.8-9.1 which occurred at epicentral distances of 80-14.6 thousand km are revealed. Based on the HGSV morphological features, four main types of these variations are distinguished: oscillations (I); short (up to tens of hours) water level rises (II) superimposed on oscillations; short rises (III); and long (1.5-3 months) drawdowns (IV). The dependence of the occurrence of the revealed GHSV types on earthquake parameters (magnitude and distance), specific energy density and maximum seismic wave velocity, and the amplitude-frequency content of ground motion is analyzed based on the records at a nearest seismic station. Based on several case studies, hydrogeodynamic processes of HGSV formation are investigated using numerical modeling. It is shown that the forced and free amplitude fluctuations in the water level (types I and II) can arise due to the enhancement of groundwater pressure variations in the well-water-bearing rock system during the passage of surface seismic waves with periods corresponding to the resonant frequency of the well (τ = 44.6 s). The rise in the water level in well lasting for tens minutes to hours (types II and III of HGSV variation) is caused by the short increase in pressure under violation of the steady water flow in the direct vicinity of the well; strong local earthquakes accompanied by ground shaking with intensity I msk-64 ≥ 5 cause sustained drawdowns (type IV) due to pressure drop with the amplitudes up to 0.1 bar within a radius of up to a few hundred meters from the well.

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The implementation of information system elements for interpreting integrated geophysical observations in Kamchatka

Cited by 7 publications

References 0 publications

Seismo-Hydrogeodynamic Effects in Groundwater Pressure Changes: A Case Study of the YuZ-5 Well on the Kamchatka Peninsula

Seismo-Hydrogeodynamic Effects in Groundwater Pressure Changes: A Case Study of the YuZ-5 Well on the Kamchatka Peninsula

Variability in the Statistical Properties of Continuous Seismic Records on a Network of Stations and Strong Earthquakes: A Case Study from the Kamchatka Peninsula, 2011–2021

Effects of Seismic Waves in Water Level Changes in a Well: Empirical Data and Models

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