Migration of seismic and volcanic activity as display of wave geodynamic process

Publications about the earthquake foci migration have been reviewed. An important result of such studies is establishment of wave nature of seismic activity migration that is manifested by two types of rotational waves; such waves are responsible for interaction between earthquakes foci and propagate with different velocities. Waves determining long-range interaction of earthquake foci are classified as Type 1; their limiting velocities range from 1 to 10 cm/s. Waves determining short-range interaction of foreshocks and aftershocks of individual earthquakes are classified as Type 2; their velocities range from 1 to 10 km/s. According to the classification described in [Bykov, 2005], these two types of migration waves correspond to slow and fast tectonic waves. The most complete data on earthquakes (for a period over 4.1 million of years) and volcanic eruptions (for 12 thousand years) of the planet are consolidated in a unified systematic format and analyzed by methods developed by the authors. For the Pacific margin, Alpine-Himalayan belt and the Mid-Atlantic Ridge, which are the three most active zones of the Earth, new patterns of spatial and temporal distribution of seismic and volcanic activity are revealed; they correspond to Type 1 of rotational waves. The wave nature of the migration of seismic and volcanic activity is confirmed. A new approach to solving problems of geodynamics is proposed with application of the data on migration of seismic and volcanic activity, which are consolidated in this study, in combination with data on velocities of movement of tectonic plate boundaries. This approach is based on the concept of integration of seismic, volcanic and tectonic processes that develop in the block geomedium and interact with each other through rotating waves with a symmetric stress tensor. The data obtained in this study give grounds to suggest that a geodynamic value, that is mechanically analogous to an impulse, remains constant in such interactions. It is thus shown that the process of wave migration of geodynamic activity should be described by models with strongly nonlinear equations of motion

Prediction of future great earthquake times off Kamchatka and the northern Kurils

On the basis of the writer's data of the migration of great 18-20th century earthquakes and their repeat times he offers a forecast of the times of large earthquakes that are likely to occur in the northern Kurils and Kamchatka during the late 20th - early 21st centuries. The evolution of a seismicity pattern in the region is suggested

Migration and recurrence of great earthquakes in Kamchatka and the northern Kurils

The Benioff zone off Kamchatka and the northern Kuril Islands is divided into several blocks using the source area locations of great 20th century earthquakes. The occurrence of the great 18 to 20th century earthquakes defines three migrations. Two of them take place along the Benioff zone. One involves several blocks, or source areas of great earthquakes, and is from southwest to northeast, the duration of earthquake sequences being within 21 years. The other involves all blocks and proceeds in both directions at approximately equal velocities, 4±1 km/yr. Some evidence suggests that the source areas of great events migrate across the Benioff zone, the mean recurrence time being 100±40 years. The results obtained will be used to forecast the periods of time during which great earthquakes are likely to occur within the blocks

Modern Concept of Block Hierarchy in the Structure of Geomedium and Its Implications in Geosciences

The article discusses and extends the known concept on higher of blocks in the structure of geomedium by Peive–Sadovsky. It is shown that interaction of structural geoblocks generates force moment. This allows construction of rotation model of geomedium, assumption of the existence of “rotation” waves and explanation of rheidity properties of geomedium. It appears that representative values of “rotation” wave velocities are close to the velocities of pendulum waves (µ-waves by Oparin)

Migration of seismic and volcanic activity as display of wave geodynamic process

Publications about the earthquake foci migration have been reviewed. An important result of such studies is establishment of wave nature of seismic activity migration that is manifested by two types of rotational waves; such waves are responsible for interaction between earthquakes foci and propagate with different velocities. Waves determining long-range interaction of earthquake foci are classified as Type 1; their limiting velocities range from 1 to 10 cm/s. Waves determining short-range interaction of foreshocks and aftershocks of individual earthquakes are classified as Type 2; their velocities range from 1 to 10 km/s. According to the classification described in [Bykov, 2005], these two types of migration waves correspond to slow and fast tectonic waves. The most complete data on earthquakes (for a period over 4.1 million of years) and volcanic eruptions (for 12 thousand years) of the planet are consolidated in a unified systematic format and analyzed by methods developed by the authors. For the Pacific margin, Alpine-Himalayan belt and the Mid-Atlantic Ridge, which are the three most active zones of the Earth, new patterns of spatial and temporal distribution of seismic and volcanic activity are revealed; they correspond to Type 1 of rotational waves. The wave nature of the migration of seismic and volcanic activity is confirmed. A new approach to solving problems of geodynamics is proposed with application of the data on migration of seismic and volcanic activity, which are consolidated in this study, in combination with data on velocities of movement of tectonic plate boundaries. This approach is based on the concept of integration of seismic, volcanic and tectonic processes that develop in the block geomedium and interact with each other through rotating waves with a symmetric stress tensor. The data obtained in this study give grounds to suggest that a geodynamic value, that is mechanically analogous to an impulse, remains constant in such interactions. It is thus shown that the process of wave migration of geodynamic activity should be described by models with strongly nonlinear equations of motion

Wave moment geodynamics

The work presents a review of natural-science representations on the rotary motion of matter and its piecewise structure. Development of dense GPS-networks allowed to experimentally confirm the concept of block structures of the geophysical environment and to prove rotary character of block movement. An analysis of both the migration of earthquake sources and the movement of sections of tectonic plates' borders has allowed to reveal general properties of such movements and to prove their wave nature. It is shown that within the limits of rotational model, blocks and plates are interconnected among themselves by the elastic long-range fields forming a uniform planetary geodynamic field. It is offered to use the geodynamic solutions of rotational model in the one class of phenomena as a basis at the construction of a new geological paradigm - wave moment geodynamics. © 2012 Versita Warsaw and Springer-Verlag Wien