Macroseismic field of the March 4, 1977 Vrancea earthquake

1979 ◽  
Vol 53 (3-4) ◽  
pp. 185-186 ◽  
Author(s):  
C. Radu ◽  
G. Polonic ◽  
I. Apopei
Keyword(s):  
Macroseismic Field ◽  
Vrancea Earthquake

scholarly journals An analytic method for separating local from regional effects on macroseismic intensity

1995 ◽  
Vol 38 (1) ◽  
Author(s):  
P. Tosi ◽  
V. De Rubeis ◽  
C. Gasparini
Keyword(s):  
Macroseismic Intensity ◽  
Analytic Method ◽  
Macroseismic Data ◽  
Regional Trend ◽  
Regional Effects ◽  
Republic Of Macedonia ◽  
Macroseismic Field ◽  
Qualitative Nature ◽  
Local Intensity ◽  
Yugoslavian Republic

nterpretation of macroseismic data is hazardous, due to its qualitative nature. This, linked with errors in eval- uation,) and the variations of local intensity, makes it difficult to draw valid conclusions. This study presents a statistical method as the basis for distinguishing the diverse components that constitute a macroseismic field. The method is based on the polar transformation of the coordinate system and on the analysis of the fractal di- mension of the intensity values, exposed to the gradually increasing action of a two-dimensional filter. The fractal dimension is shown to be an ideaI parameter with which to measure out the filtering process in order to separate the local components from the regional trend. This method has been applied to two Italian events and to an earthquake which took pIace in the Former Yugoslavian Republic of Macedonia (FYROM).

Isoseismal map of the Vrancea earthquake of March 4, 1977

1979 ◽  
Vol 53 (3-4) ◽  
pp. 187-193 ◽  
Author(s):  
G. Radu ◽  
V. Kárník ◽  
G. Polonic ◽  
D. Procházková ◽  
Z. Schenková
Keyword(s):  
Isoseismal Map ◽  
Vrancea Earthquake

scholarly journals Inferences on the source mechanisms of the 1930 Irpinia (Southern Italy) earthquake from simulations of the kinematic rupture process

2009 ◽  
Vol 47 (6) ◽  
Author(s):  
A. Emolo ◽  
G. Iannaccone ◽  
A. Zollo ◽  
A. Gorini
Keyword(s):  
Ground Motion ◽  
Southern Italy ◽  
Empirical Relationship ◽  
Normal Fault ◽  
Rupture Process ◽  
Macroseismic Data ◽  
Macroseismic Field ◽  
Good Reproduction ◽  
Source Mechanisms ◽  
Source Models

We examine here a number of parameters that define the source of the earthquake that occurred on 23rd July 1930 in Southern Italy (in the Irpinia region). Starting from the source models proposed in different studies, we have simulated the acceleration field for each hypothesized model, and compared it with the macroseismic data. We then used the hybrid stochastic-deterministic technique proposed by Zollo et al. (1997) for the simulation of the ground motion associated with the rupture of an extended fault. The accelerations simulated for several sites were associated with the intensities using the empirical relationship proposed by Trifunac and Brady (1975), before being compared with the available data from the macroseismic catalogue. A good reproduction of the macroseismic field is provided by a normal fault striking in Apenninic direction (approximately NW-SE) and dipping 55° toward the SW.

scholarly journals MIDDLE URAL EARTHQUAKE on October 18, 2015, ML=4.7, I0=6

2021 ◽  
pp. 314-323
Author(s):  
F. Verkholantsev ◽  
I. Gabsatarova ◽  
N. Guseva ◽  
R. Dyagilev
Keyword(s):  
Focal Mechanism ◽  
Seismic Effect ◽  
Middle Urals ◽  
Macroseismic Data ◽  
Macroseismic Field ◽  
Tectonic Position ◽  
The Village

Instrumental and macroseismic data on the earthquake of 18.10.2015 at 21h44m UTC, ML=4.7, I0=6 in the Sverdlovsk region, near the village of Sabik (Middle Urals) are presented. A significant amount of macroseismic data made it possible to build a map of the macroseismic field, taking into account the anisotropic nature of the propagation of the seismic effect. Taking into account the decision of the focal mechanism, the tectonic position of the source was substantiated.

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