Environmental Seismic Intensity scale - ESI 2007 La scala di Intensità Sismica basata sugli effetti ambientali - ESI 2007

Michetti, A.M. and Esposito, E. and Guerrieri, L. and Porfido, Sabina and Serva, L. and Tatevossian, R. and Vittori, E. and Audemard, F. and Azuma, T. and Clague, J. and Comerci, V. and Gürpinar, A. and Mc Calpin, J. and Mohammadioun, B. and Mörner, N.A. and Ota, Y. and Roghozin, E: (2007) Environmental Seismic Intensity scale - ESI 2007 La scala di Intensità Sismica basata sugli effetti ambientali - ESI 2007. Memorie descrittive della carta geologica D'Italia, LXXIV . APAT.


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ABSTRACT - The Environmental Seismic Intensity scale (ESI 2007) is2007) is a new earthquake intensity scale only based on the effects triggered by the earthquake in the natural environment. The coseismic effects considered more diagnostic for intensity evaluation are surface faulting and tectonic uplift/subsidence (primary effects), landslides, ground cracks, liquefactions, displaced boulders, tsunami and hydrological anomalies (secondary effects). The ESI 2007 scale follows the same basic structure as any other XII degree scale, such as the MCS, MM, MSK and EMS scales. This type of intensity scale was proposed to the scientific community since the beginning of '90s. The idea was definitely accepted in 1999, when a first version of the scale was developed by a Working Group of geologists, seismologists and engineers sponsored by the International Union for Quaternary Research (INQUA). In the following years, this version has been revised and updated. The ESI 2007 scale is the result of the revision of previous versions after its application to a large number of earthquakes worldwide. In the frame of INQUA SubCommission on Paleoseismicity, this activity was conducted by academic and research institutes coordinated by the Geological Survey of Italy - APAT (for further details, s e e h t t p : / / w w w. a p a t . g o v. i t / s i t e / e n - GB/Projects/INQUA_Scale/default.html). For intensity levels lower than IX, the main goal of this new scale is to bring the environmental effects in line with the damage indicators. In this range, the ESI 2007 scale should be used along with the other scales. In the range between X and XII, the distribution and size of environmental effects, specially primary tectonic features, becomes the most diagnostic tool to assess the intensity level. Documentary report and/or field observations on fault rupture length and surface displacement should be consistently implemented in the macroseismic study of past and future earthquakes. Therefore, the use of the ESI 2007 alone is recommended only when effects on humans and on manmade structures i) are absent, or too scarce (i.e. in sparsely populated or desert areas), and ii) saturate (i.e., for intensity X to XII) loosing their diagnostic value. After its official approval at the 17th INQUA Congress, the use of the ESI 2007 scale will be proposed to national institutions (geological surveys, academic and research institutes, departments for civil protection, environmental agencies, etc.), dealing in the field of earthquake intensity and seismic hazard

Item Type: Book
Uncontrolled Keywords: ESI 2007scale, nuova scala macrosismica, effetti sismoindotti, ground effects, effetti primari, effetti secondari, sismicità, intensità, intensity
Subjects: 500 Scienze naturali e Matematica > 550 Scienze della Terra
Depositing User: dr Sabina Porfido
Date Deposited: 18 Mar 2009
Last Modified: 12 Oct 2010 10:15
URI: http://eprints.bice.rm.cnr.it/id/eprint/834

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