E. V. Sasorova's research while affiliated with P.P. Shirshov Institute of Oceanology and other places

Publications (45)

Article
Analysis of observations of the Earth’s rotational velocity and volcanic activity of the planet from 1720 until 2015 suggests that higher volcanic activity temporally coincided with periods of decreased angular velocity of Earth’s rotation (deceleration), and, vice versa, lower volcanic activity coincided with the periods of increased velocity of t...
Article
Analysis of observations of the Earth's rotational velocity and volcanic activity of the planet from 1720 until 2015 suggests that higher volcanic activity temporally coincided with periods of decreased angular velocity of Earth's rotation (deceleration), and, vice versa, lower volcanic activity coincided with the periods of increased velocity of t...
Article
Full-text available
On the basis of three methods, the current seismic situation in the zone of the Central Sakhalin Fault is assessed and the scenarios of its development are predicted. It is shown that beginning from early 2017 seismic activity considerably increased in comparison with previous years. It is determined that there is a very high probability of occurre...
Article
Full-text available
The global parameters of the planets of the solar system are considered taking into account periodic variations of the main parameters, and it is shown that the cyclic variation of the polar compression for some planets should lead to pulsations in the shape of the planets and the intensification / weakening of the intensity of geophysical processe...
Article
Full-text available
The role played by the Earth’s rotation is very important in problems of physics of the atmosphere and ocean. The importance of inertia forces is traditionally estimated by the value of the Rossby number: if this parameter is small, the Coriolis force considerably affects the character of movements. In the case of convection in the Earth’s mantle a...
Article
For more than a decade, the global network of GPS stations whose measurements are part of the International GPS Service (IGS) have been recording cyclic variations in the radius vector of the geodetic ellipsoid with a period of one year and amplitude of ~10 mm. The analysis of the figure of the Earth carried out by us shows that the observed variat...
Article
Full-text available
The author analyzed the relationship between variations of the Earth's rotation rate and the geodynamic processes within the Earth's body, including seismic activity. The rotation rate of a planet determines its uniaxial compression along the axis of rotation and the areas of various surface elements of the body. The Earth's ellipticity variations,...
Article
It is shown that, for the low-frequency component of the time series in the angular velocity of the Earth’s rotation, the maximums of seismic activity correspond to the final stages of decrease in the angular velocity of rotation (deceleration) and the local minimums coincide with maximums of seismic activity. The minimums of seismic activity corre...
Article
Both spatial and spatiotemporal distributions of the sources of tsunamigenic earthquakes of tectonic origin over the last 112 years have been analyzed. This analysis has been made using tsunami databases published by the Institute of Computational Mathematics and Mathematical Geophysics (Siberian Branch, Russian Academy of Sciences) and the Nationa...
Article
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We analyzed what kind of fundamental physical phenomena can be responsible for the generation of the anomalous latitudinal zones of the seismic activity, and the hotspots, and some other geophysical processes. The assessment of tidal effect contribution to the earthquake preparation process is discussed. A disk model of the Earth's rotation was pro...
Article
Full-text available
The concept of an essential latitudinal dependence of different geophysical processes occurring on the rotating Earth was formed in the last two decades. The objective of this work is to present a few statistically reliable regularities in the latitudinal distributions of the following geophysical phenomena: earthquakes, hotspots, and major and sup...
Article
The spatial-temporal distributions of earthquakes in the Kuril-Okhotsk region were analyzed. The events with Ms ≥ 4 from 1980 until 2009 and Ms ≥ 7 from 1910 until 2009 (20576 and 76 earthquakes, respectively) were studied. The specially developed program complex allowed us to obtain the 4-D distribution of the seismic events (along the sections, d...
Article
Full-text available
Results of hydroacoustic observations of signals from weak earthquakes in natural conditions in the region of the Southern Kuril Islands are presented. Some earthquakes were registered by the the Yuzhno-Kurilsk Seismic Station, other were only recorded by hydrophone stations. The observations were specific as seismic signals were recorded in shallo...
Article
The aim of this work is to present the results of comparative analysis of latitudinal distributions of the earthquakes and released energy in subduction and spreading zones. In previous works authors carried out the analysis of EQ latitudinal distributions of a wide spectrum of seismic events on the material of the ISC catalogue (more than 250000 e...
Article
The results of the processing and analysis of the global earthquake distribution (more than 250000 events based on the ISC catalog) and the study of moonquakes distribution (about 900 events based on the published materials) are presented. It was found that the number of events and the energy for both cases show a bimodal distribution with maximums...
Article
In this work, characteristic features of seismic event distribution by latitudes and depth are compared for the Earth and the Moon. It is shown that earthquakes and moonquakes are distributed similarly by latitudi� nal belts. The problem of earthquake epicenter distribution by latitudinal belts of the Earth was stated in the 1960s. Firstly, only th...
Article
This study is an attempt at a theoretical synthesis of the following earthquake parameters: the length and volume of the rupture zone, energy, magnitude, energy class, as well as the period and frequency of seismic signals. We have obtained the signal period (T) as a function of event energy (E) for a very broad class of events ranging from large e...
Article
Full-text available
We considered the seismic regime in the upper 70–100 km of the lithosphere and identified the layers (at depths of about 10, 20–30, and 60–80 km) characterized by relatively reduced effective strength and increased seismicity. The existence of such layers is related to changes in the regime of fluid-rock interaction, namely, to the characteristic d...
Article
The objective of this work is the analysis of the statistically valid regularity of the EQ distribution in depth and in latitudinal belts for different magnitude ranges (MR). The worldwide catalog ISC (from 1964 with Mb>=4.0) were used. The entire set of events under analysis was divided into several MR. The analysis of the completeness of events i...
Article
At first the interannual earthquake distributions and its peculiarity in predetermined region are considered. The hypothesis about within-year variability existence for the events of various energy levels was tested. The worldwide catalogs ISC (International Seismic Catalog) and NEIC (USGS) were used. It was extracted all EQs for the Pacific part o...
Article
Full-text available
In the last decade, there has been growing interest in problems related to searching global spatiotemporal regularities in the distribution of seismic events on the Earth. The worldwide catalogs ISC were used for search of spatial and temporal distribution of earthquakes (EQ) in the Pacific part of South America. We extracted all EQ from 1964 to 20...
Article
Recent investigations have shown that the probability of the occurrence of earthquakes in a specified region depends on several factors, such as the latitude of the study region, as well as the lunar and solar tidal forces, which are governed by the mutual arrangement of bodies in the Sun-Earth-Moon system. The objective of our work is to prove tha...
Article
The geological sciences have recently demonstrated a tendency to move away from considering the Earth as an immobile system and from explaining global seismic processes only by endogenic interrelationships. Nowadays, some geologists take into consideration external forces and irregularities in the orbital parameters of the Earth in the Earth‐Sun‐Mo...
Article
The results of statistical analysis of worldwide seismic catalogs (ISC and NEIC), which was carried out in frame of two projects are presented. In both cases we extracted the evens occurred in the Pacific region from 1964 with Mb>=4.0. The aftershocks were canceled from the list. All events were divided into following magnitude ranges (MR): 4
Article
At present, the problem of predicting tsunamis with source earthquakes near the shoreline remains practically unresolved. It is shown that, in the Pacific region, 87% of tsunamigenous earthquake epicenters are located closer than 100 km to the shoreline and 67% are closer than 50 km. For a more detailed analysis, the area of the Pacific Ocean was d...
Article
Full-text available
The results of laboratory experiments on rock sample destruction and the observation data obtained from several series of the hydro-acoustic observations in which the researchers succeeded to register the signals in the critical stage of the earthquake (EQ) preparation were compared. According to theoretical research (Alekseev et al., 2001) two dis...
Article
The investigation of the Central Kuril Islands (Simushir, Urup, Ketoy) coast was performance by the field survey for the Institute of Marine Geology and Geophysics FEB RAS (Yuzhno-Sakhalinsk) on the vessel "Iskatel-4" to be able find different deposits of the devastating tsunami waves influence on soil and vegetation. There were average run-up heig...
Article
The results of statistical analysis of worldwide seismic catalogs (ISC and NEIC), which was carried out in frame of two projects are presented. In both cases we extracted the evens occurred in the Pacific region from 1964 to 2004 with Mb>=4.0. The aftershocks were canceled from the list. All events were divided into following magnitude levels: 4
Article
The earthquake (EQ) occurrence is considered now as a random phenomenon. But it was observed during written history that the seismic events occur in various regions of the Earth in some months of a year significantly more often than in another. If the variability exists, then occurrences of the seismic events depend on the position of the Earth -Mo...
Chapter
Recently, it has been shown that the Earth's seismicity and probability of earthquake occurrence in a given region depends on astronomical factors: the geographical latitude of the event, and the relative attitude of the Earth, the Sun and the Moon. An analysis of the annual earthquake distributions in some Pacific regions (South America, Aleutian...
Chapter
The worldwide catalogs ISC and NEIC (total amount of events from 1966 is more than 200000) were used in a search of spatial and temporal distribution of earthquakes (EQ). The distributions of the events between Northern and Southern parts of the Pacific region are different for various magnitude levels (4 ≤ Mb < 4.5; 4.5 ≤ Mb < 5; 5 ≤ Mb < 5.5; 5.5...
Article
The elucidation of the periodicity of activation of seismic processes at different energy levels represents a topical problem in seismology, as it casts light on the physical mechanisms that govern the processes of preparation and generation of earthquakes. Intraannual periodicity, or the recurrence of seismicity activation, in the individual regio...
Article
The objective of our work is to perform a specific procedure of electronic earthquake catalog analysis, using methods of nonparametric statistics, in order to distinguish the conditions of appearance and the significance of nonrandom component in the process of temporal earthquake distribution between the NP North Pacific and SP South Pacific.
Chapter
Local tsunami warning remains a difficult task. A possible way to solve this problem is to process acoustic signals, which appear in the water at the critical stage of a submarine earthquake preparation. An earthquake (EQ) preparation zone or “dilatant” zone is characterized by increasing micro-crack density. This process generates acoustic signals...
Article
It is proved that visually observed inhomogeneity in within-year seismic events distribution for some Pacific Ocean regions is statistically significant and differently manifests for earthquakes with different energy level and different center depths.
Article
In recent years, geophysicists have devoted much attention to the search for regular spatial and temporal features in the distribution of seismic events over the Earth. At the same time, the knowledge of the lithosphere has been developed in terms of active geophysical medium with structural units capable of accumulating additional elastic energy a...

Citations

... Furthermore, the observed periodicity in earthquake and eruption activity is difficult to explain with the ever-increasing temperatures due to anthropogenic climate change. More promisingly, periods of deceleration of the Earth's rotational velocity have been linked with increased rates of both earthquakes (Anderson, 1974;Bendick & Bilham, 2017;Shanker et al., 2001) and eruptions (Levin et al., 2019;Palladino & Sottili, 2014;Tuel et al., 2017). However, the feedback and interactions between earthquakes and eruptions and the solid Earth, atmospheric, and astronomic processes that control the rotation of the Earth are far from clear. ...
... For analysis, we selected earthquakes in Sakhalin with a magnitude of M > 5.5 for the period of 2004-2018. The number of these earthquakes proved to be five (Table 1); moreover, all of them were studied from the standpoint of the LURR method (Zakupin, 2016;Tikhonov and Zakupin, 2016;Levin et al., 2018). Unfortunately, due to the absence (up to 2004) of the catalogue of the necessary representativity for SDP simulation, we do not consider the Neftegorsk earthquake (1995, M = 7.2), known in Sakhalin, though the medium-term retrospective prediction was obtained for it using the LURR method. ...
... As possible precursors, the variations in phase characteristics of tides (Saltykov, 2017) and the anomalies of natural electromagnetic fields (Parovyshny et al., 2019) were marked. Works on the influence of the instability of the Earth's rotation on different processes in the geosphere (Sidorenkov, 2002), including on seismicity (Levin et al., 2017, are known. ...
... The uneven rotation of the Earth is mainly explained by the influence of processes in the atmosphere (Zotov et al., 2017). At the same time, some researchers pointed to a connection between the irregular rotation of the Earth and seismicity (Shanker et al., 2001;Levin et al., 2017). A possible trigger mechanism for the influence of Earth rotation variations on the seismic process was studied in (Bendick, and Bilham, 2017). ...
... A great number of papers, devoted to various aspects of seismicity, both global and regional, have been published so far. The most popular aspects of the subject are: correlation of the seismicity and the solar activity [11,12]; dependence of the global seismicity from the position of celestial bodies and the Moon in particular [15,18], annual and seasonal periodicity of the global and local seismicity [2,3,5,8,13,14] and other aspects (refer, e.g., to [9]). At the most the study of seismicity in these papers pursues prediction purposes, and at the least geodynamic purposes. ...
... Generally, a single event was detected (Dawson and Smith, 2000; Banerjee et al., 2001 Altunel et al., 2004), although as many as six tsunamis have been recorded in a few cores (i.e., Kontopoulos and Avraimidis, 2003; Nomade et al., 2005). Storm or tsunami periodicity has been tracked in very recent time series (from 1950 or later), with the application of both spectral and Monte Carlo analysis (Levin and Sasorova, 2002; Watts, 2004). In coastal environments, sedimentary deposits associated with tsunamis are characterized by: (a) large boulders, boulder ridges, pebbles, and shells high above the modern storm level (Scheffers and Kelletat, 2005); (b) washover fans (Luque et al., 2002); (c) sandy, sometimes bioclastic sheets with evidences of bidirectional flows (Nanayama et al., 2000); (d) sandy layers intercalated in muddy deposits (Fujiwara et al., 2000); or (e) shell-bearing deposits sandwiched by fossil soils (McMurty et al., 2004). ...
... A number of studies have established that annual fluctuations in the numbers of major earthquakes (Mw ≥ 7.0) vary over periods of decades, and that these cyclic changes in seismic productivity correlate with long period variations in Earth's angular rotation rate (Anderson, 1974;Kanamori 1977;Shankar et al., 2001;Varga et al., 2004;Levin and Sasorova, 2015;Sasarova and Levin, 2018;Lutikov & Rogozhin (2014). The Mw ≥ 7 magnitude threshold in these studies arises because seismic catalogs since 1900 are decreasingly complete in lower magnitude earthquakes in the early instrumental record (see Supplementary Material S1). ...
... Such variations in the rotational velocity can generate amplification or attenuation of a whole series of catastrophic geophysical phenomena. In recent years, scientific literature has published papers showing the 4 relationship between the variations in the angular velocity of the Earth's rotation and the increase in seismic and volcanic activity [3][4][5][6]. ...
... In the Russian Far East, relatively not long ago, studies into the anomalous behavior of a number of geophysical parameters have been conducted to reveal short-term precursors. Certain optimistic results have been obtained, including precursors separated into hydroacoustic (Borisov et al., 2012), geoacoustic (Marapulets et al, 2012;Gavrilov et al., 2017;Druzhin et al., 2017), and hydrogeological (Kopylova, 2018) parameters. As possible precursors, the variations in phase characteristics of tides (Saltykov, 2017) and the anomalies of natural electromagnetic fields (Parovyshny et al., 2019) were marked. ...
... Angular rate of the Earth influences the equatorial radius and the Planet's compression. An increase (decrease) of the angular rate produces increase (decrease) of the equatorial radius and an enhancement (reduction) of the Planet's compression [14]. Many factors influence the Earth's rotation during acceleration and deceleration: the different rotation speed around the Sun in accordance with the conservation of angular momentum; the north and west biweekly tide forces that move plates in geographic direction of meridian and parallels respectively; effects dependent on the Moon and the Sun configuration to the equator deforming the Earth's shape; coincidences with sidereal semi-period of the full or new Moon's orbit in solstices and equinoxes; dynamical slow influence of the liquid core of the Earth and climatic variations in the atmosphere [15e23]. ...