A proposed basis for geographical and seismic regionalization

Flinn, Edward A.; Engdahl, E. R.

doi:10.1029/rg003i001p00123

Cited by 52 publications

(34 citation statements)

References 2 publications

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“…In several cases seismic zonation models have been used for seismicity or earthquake forecasting studies. A first global zonation attempt was performed by Flinn and Engdahl (1965), who proposed a seismic regionalization scheme that was refined later (Flinn et al, 1974) and revised in 1995 (Young et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

A detailed seismic zonation model for shallow earthquakes in the broader Aegean area

Vamvakaris

Papazachos

Papaioannou

et al. 2016

Nat. Hazards Earth Syst. Sci.

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Abstract. In the present work we propose a new seismic zonation model of area type sources for the broader Aegean area, which can be readily used for seismic hazard assessment. The definition of this model is based not only on seismicity information but incorporates all available seismotectonic and neotectonic information for the study area, in an attempt to define zones which show not only a rather homogeneous seismicity release but also exhibit similar active faulting characteristics. For this reason, all available seismological information such as fault plane solutions and the corresponding kinematic axes have been incorporated in the analysis, as well as information about active tectonics, such as seismic and active faults. Moreover, various morphotectonic features (e.g. relief, coastline) were also considered. Finally, a revised seismic catalogue is employed and earthquake epicentres since historical times (550 BC-2008) are employed, in order to define areas of common seismotectonic characteristics, that could constitute a discrete seismic zone. A new revised model of 113 earthquake seismic zones of shallow earthquakes for the broader Aegean area is finally proposed. Using the proposed zonation model, a detailed study is performed for the catalogue completeness for the recent instrumental period.Using the defined completeness information, seismicity parameters (such as G-R values) for the 113 new seismic zones have been calculated, and their spatial distribution was also examined. The spatial variation of the obtained b values shows an excellent correlation with the geotectonic setting in the area, in good agreement with previous studies. Moreover, a quantitative estimation of seismicity is performed in terms of the mean return period, T m , of large (M ≥ 6.0) earthquakes, as well as the most frequent maximum magnitude, M t , for a typical time period (T = 50 yr), revealing significant spatial variations of seismicity levels within the study area. The new proposed seismic zonation model and its parameters can be readily employed for seismic hazard assessment for the broader Aegean area.

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Section: Introductionmentioning

confidence: 99%

A detailed seismic zonation model for shallow earthquakes in the broader Aegean area

Vamvakaris

Papazachos

Papaioannou

et al. 2016

Nat. Hazards Earth Syst. Sci.

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“…In all cases, the standard deviation of the magnitude estimate, corrected for station-source region bias, is reduced. The improvement appears to be greater for *The regionalization scheme employed in this paper is that of Flinn and Engdahl (1965).…”

Section: Results Of Station-source Region Bias Calculationsmentioning

confidence: 99%

Improved body-wave magnitudes of Aleutian earthquakes

Tarr¹

1971

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“…The Flinn-Engdahl regionalization of Earth is the most used and consists in dividing Earth into fifty seismic regions, as shown in Fig. 2 [44][45][46]. Table 1 enumerates the F-E regions, the corresponding number of seismic events observed during the period of analyses and the maximum and minimum amplitudes registered.…”

Section: Brief Description Of the Datasetmentioning

confidence: 99%

Fractional dynamics and MDS visualization of earthquake phenomena

Lopes¹,

Machado²,

Pinto³

et al. 2013

Computers & Mathematics with Applications

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This paper analyses earthquake data in the perspective of dynamical systems and frac-tional calculus (FC). This new standpoint uses Multidimensional Scaling (MDS) as a power-ful clustering and visualization tool. FC extends the concepts of integrals and derivatives to non-integer and complex orders. MDS is a technique that produces spatial or geometric representations of complex objects, such that those objects that are perceived to be similar in some sense are placed on the MDS maps forming clusters. In this study, over three million seismic occurrences, covering the period from January 1, 1904 up to March 14, 2012 are analysed. The events are characterized by their magnitude and spatiotemporal distri-butions and are divided into fifty groups, according to the Flinn-Engdahl (F-E) seismic regions of Earth. Several correlation indices are proposed to quantify the similarities among regions. MDS maps are proven as an intuitive and useful visual representation of the com-plex relationships that are present among seismic events, which may not be perceived on traditional geographic maps. Therefore, MDS constitutes a valid alternative to classic visu-alization tools for understanding the global behaviour of earthquakes.

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A proposed basis for geographical and seismic regionalization

Cited by 52 publications

References 2 publications

A detailed seismic zonation model for shallow earthquakes in the broader Aegean area

A detailed seismic zonation model for shallow earthquakes in the broader Aegean area

Improved body-wave magnitudes of Aleutian earthquakes

Fractional dynamics and MDS visualization of earthquake phenomena

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