Numerical Modelling of Block-structure Dynamics: Application to the Vrancea Region

1997 ◽  
Vol 149 (2) ◽  
pp. 313-336 ◽  
Author(s):  
G. F. Panza ◽  
A. A. Soloviev ◽  
I. A. Vorobieva
Keyword(s):  
Numerical Modelling ◽  
Block Structure ◽  
Structure Dynamics ◽  
Vrancea Region

scholarly journals On dynamics of seismicity simulated by the models of blocks-and-faults systems

1997 ◽  
Vol 40 (5) ◽  
Author(s):  
A. I. Gorshkov ◽  
V. I. Keilis-Borok ◽  
I. M. Rotwain ◽  
A. A. Soloviev ◽  
I. A. Vorobieva
Keyword(s):  
Numerical Simulation ◽  
Earthquake Prediction ◽  
Driving Forces ◽  
Block Structure ◽  
Seismicity Patterns ◽  
Strong Earthquakes ◽  
Structure Dynamics ◽  
Prediction Algorithms ◽  
The Media

The major results obtained by numerical simulation of block structure dynamics are juxtaposed and analysed: the possibilities to reconstruct tectonic driving forces from territorial distribution of seismicity, clustering of earthquakes in the model, and dependence of the occurrence of strong earthquakes on fragmentation of the media, and on rotation of blocks. These results show that modelling of block structure dynamics is a useful tool to study relations between the geometry of faults and block movements and earthquake flow, including premonitory seismicity patterns, to test the existing earthquake prediction algorithms, and to develop new ones.

Modelling of Block-structure Dynamics: Parametric Study for Vrancea

1999 ◽  
Vol 156 (3) ◽  
pp. 395-420 ◽  
Author(s):  
A. A. Soloviev ◽  
I. A. Vorobieva ◽  
G. F. Panza
Keyword(s):  
Parametric Study ◽  
Block Structure ◽  
Structure Dynamics

scholarly journals Transformation of frequency-magnitude relation prior to large events in the model of block structure dynamics

2008 ◽  
Vol 15 (1) ◽  
pp. 209-220 ◽  
Author(s):  
A. Soloviev
Keyword(s):  
Normal State ◽  
Block Structure ◽  
B Value ◽  
Fault Zones ◽  
Earthquake Catalogue ◽  
Separate Analysis ◽  
Strong Earthquakes ◽  
Structure Dynamics ◽  
Time Periods ◽  
Frequency Magnitude

Abstract. The b-value change in the frequency-magnitude (FM) distribution for a synthetic earthquake catalogue obtained by means of the model of block structure dynamics has been studied. The catalogue is divided into time periods preceding strong earthquakes and time periods that do not precede strong earthquakes. The separate analysis of these periods shows that the b-value is smaller before strong earthquakes. The similar phenomenon has been found also for the observed seismicity of the Southern California. The model of block structure dynamics represents a seismic region as a system of perfectly rigid blocks divided by infinitely thin plane faults. The blocks interact between themselves and with the underlying medium. The system of blocks moves as a consequence of prescribed motion of the boundary blocks and of the underlying medium. As the blocks are perfectly rigid, all deformation takes place in the fault zones and at the block base in contact with the underlying medium. Relative block displacements take place along the fault zones. Block motion is defined so that the system is in a quasistatic equilibrium state. The interaction of blocks along the fault zones is viscous-elastic ("normal state") while the ratio of the stress to the pressure remains below a certain strength level. When the critical level is exceeded in some part of a fault zone, a stress-drop ("failure") occurs (in accordance with the dry friction model), possibly causing failure in other parts of the fault zones. These failures produce earthquakes. Immediately after the earthquake and for some time after, the affected parts of the fault zones are in a state of creep. This state differs from the normal state because of a faster growth of inelastic displacements, lasting until the stress falls below some other level. This numerical simulation gives rise a synthetic earthquake catalogue.

Stages of strike-slip faulting and block structure dynamics

2019 ◽  
Author(s):  
R. A. Bakeev ◽  
Yu. P. Stefanov ◽  
G. G. Kocharyan
Keyword(s):  
Block Structure ◽  
Strike Slip ◽  
Structure Dynamics

The nature of moss and lower atmospheric seismology

2005 ◽  
Vol 364 (1839) ◽  
pp. 383-394 ◽  
Author(s):  
B De Pontieu ◽  
R Erdélyi
Keyword(s):  
Active Region ◽  
Numerical Modelling ◽  
Recent Work ◽  
Transition Region ◽  
Solar Atmosphere ◽  
Solar Chromosphere ◽  
Structure Dynamics ◽  
Oscillations And Waves ◽  
Lower Solar Atmosphere

The discovery of so-called solar ‘moss’, i.e. dynamic and bright upper transition region emission at chromospheric heights above active region plage, provides a novel diagnostic to probe the structure, dynamics, energetics and coupling of the magnetized solar chromosphere and transition region. We briefly review observations of the morphology and connectivity in the low solar atmosphere, with a particular focus on the propagation of oscillations and waves in the moss. We also present recent work that combines moss observations and numerical modelling, and which sheds light on the (quasi-periodic) formation of dynamic jets (spicules), and the propagation of normally evanescent oscillations into the corona. We also briefly explore how coronal oscillations could be exploited to determine the connectivity between photosphere and corona, i.e. perform seismology of the lower solar atmosphere.

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