On an anisotropic attenuation law of the macroseismic intensity

Teramo, A.; Stillitani, E.; Bottari, Antonio

doi:10.1007/bf00613407

Cited by 15 publications

(3 citation statements)

References 8 publications

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“…A first attempt to relate ESI intensity and magnitude was performed in the Mediterranean region [43], whereas the only regression of ESI intensity with distance was developed in the Italian Apennines [6]. A possible improvement in the performance of ESI intensity prediction equation is the development of an anisotropic attenuation law, which takes into account the elongation of isoseismals in the direction of the seismogenic source (e.g., [44,45]).…”

Section: Environmental Effects and Esi Scale: Are They Reliable?mentioning

confidence: 99%

Assessing the Reliability of Earthquake Environmental Effects in Historical Events: Insights from the Southern Apennines, Italy

Ferrario

Serva²,

Bonadeo

2020

Geosciences

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Earthquake Environmental Effects (EEEs) are a common occurrence following moderate to strong seismic events. EEEs are described in literary sources even for earthquakes that occurred hundreds of years ago, but their potential for hazard assessment is not fully exploited. Here we analyze five earthquakes occurred in the Southern Apennines (Italy) between 1688 and 1980, to assess if EEEs are reliable indicators of the effects caused by past earthquakes. We investigate the spatial distribution of EEEs and their ability to repeatedly occur at the same place, and we quantitatively compare the macroseismic fields expressed in terms of damage-based intensity (MCS: Mercalli–Cancani–Sieberg) to the Environmental Scale Intensity (ESI) macroseismic field, derived from an intensity attenuation relation. We computed the field “ESI-MCS”, showing that results are consistent when comparing different seismic events and that ESI values are higher in the first ca. 10 km from the epicenter, while at distances greater than 20 km MCS values are higher than ESI. Our research demonstrates that (i) EEEs offer a detailed picture of earthquake effects in the near field and (ii) the reappraisal of literary sources under a modern perspective may provide improved input parameters that are useful for seismic hazard assessment.

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Section: Environmental Effects and Esi Scale: Are They Reliable?mentioning

confidence: 99%

Assessing the Reliability of Earthquake Environmental Effects in Historical Events: Insights from the Southern Apennines, Italy

Ferrario

Serva²,

Bonadeo

2020

Geosciences

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“…This means that, by these approximations of half intensity levels, an intensity distribution is characterized that is not consistent with the one that an anisotropic model of intensity attenuation (TERAMO et al, 1995b) would allow to be prefigured.…”

Section: The Usual Proceduresmentioning

confidence: 99%

On the Observed Intensity Filtering in the Anisotropic Distribution Modelling of Macroseismic Intensity

Termini

Teramo

Tuvè

et al. 2005

Pure appl. geophys.

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The anisotropic modelling of intensity distribution, affected by the construction of macroseismic planes, allows an analysis of the influence of each point of observed intensity on the analytical determination of epicenter and of the principal attenuation directions. Such a procedure is a vital aid in the cases in which the observed intensity points, that, for location or joined intensity level, are not consistent with an anisotropic model of intensity attenuation. A suitable filtering on intensity levels associated with the points of the intensity map, for a better modelling of observed intensity distribution, is proposed with the aim of a better seismic hazard evaluation.

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“…1,1a,1b) deduced from the original intensity map renaming the intensity levels associated with whole observed intensity points not consistent with their distance from the epicenter. Such a macroseismic plane characterizes an area distribution of intensity levels consistent with an anisotropic attenuation model (GRANDORI et al, 1987;MAUGERI et al, 1993;PERUZZA, 1995;TERAMO et al, 1995b;TERMINI et al, 2005b).…”

Section: Characterization Of Intensity Virtual Areasmentioning

confidence: 99%

On the Intensity Virtual Area Characterization in the Intensity Distribution Modelling by Macroseismic Planes

Termini

Teramo

Bottari

2005

Pure appl. geophys.

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A procedure is proposed for the reconfiguration of the macroseismic planes relative to earthquakes that, being characterized by a reduced number of points of observed intensity due to a lack of information, or having the epicenter very close to the coastline, are characterized by an incomplete distribution of observed intensity levels. The design of a plurality of virtual areas, through which a distribution of intensity consistent with an anisotropic model of attenuation is depicted, allows a reliable determination of macroseismic parameters of the same seismic event.

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On an anisotropic attenuation law of the macroseismic intensity

Cited by 15 publications

References 8 publications

Assessing the Reliability of Earthquake Environmental Effects in Historical Events: Insights from the Southern Apennines, Italy

Assessing the Reliability of Earthquake Environmental Effects in Historical Events: Insights from the Southern Apennines, Italy

On the Observed Intensity Filtering in the Anisotropic Distribution Modelling of Macroseismic Intensity

On the Intensity Virtual Area Characterization in the Intensity Distribution Modelling by Macroseismic Planes

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