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Entry: Macroseismic intensity

URI: https://terra-vocabulary.org/ncl/DataTerraRepositoryFairIncubator/motsClefs/c_08533211

A cumulative measure of the effects of an earthquake at a particular place at the Earth’s surface on humans and (or) structures and thus a measure of the strength of earthquake shaking. Different from magnitude, the intensity at a point depends not only on the earthquake strength (released seismic energy) or earthquake size (released seismic moment), but also on the epicentral distance, the focal depth, the position of the observation point with respect to the type of focal mechanism and its directivity, and the local site conditions. Intensity values are usually given as integer Roman numerals ranging from 0 to 12 (see intensity scales, macroseismic). Although coarse, they are a valuable complementary analogue for physical ground motion parameters, correlating best with ground velocity. Moreover, intensity of shaking, based on the assessment of real post-event damage, is a suitable site-related empirical risk estimator for scenario calibrations. See Chapter 12 of this Manual. Intensity is now also quantitatively estimated using ground motion measurements; such quantitative intensity measurement is called “Instrumental Intensity” to distinguish it from the qualitative seismic intensity.

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is a Concept | observable property
changed on 17 Nov 2023 08:31:48.685
submitted byElsa David
accepted on 17 Aug 2022 09:19:29.552

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date accepted 17 Aug 2022 09:19:29.552
date submitted 17 Aug 2022 08:04:10.671
definition
entity Macroseismic intensity
source graph graph

description
en A cumulative measure of the effects of an earthquake at a particular place at the Earth’s surface on humans and (or) structures and thus a measure of the strength of earthquake shaking. Different from magnitude, the intensity at a point depends not only on the earthquake strength (released seismic energy) or earthquake size (released seismic moment), but also on the epicentral distance, the focal depth, the position of the observation point with respect to the type of focal mechanism and its directivity, and the local site conditions. Intensity values are usually given as integer Roman numerals ranging from 0 to 12 (see intensity scales, macroseismic). Although coarse, they are a valuable complementary analogue for physical ground motion parameters, correlating best with ground velocity. Moreover, intensity of shaking, based on the assessment of real post-event damage, is a suitable site-related empirical risk estimator for scenario calibrations. See Chapter 12 of this Manual. Inten...
fr Caractérise la force d’un séisme par cotation des effets d’un séisme sur les hommes, les structures et l’environnement et cela en un lieu donné à la surface. L’intensité en un point dépend non seulement de la taille du séisme (magnitude) mais aussi de la distance au foyer, de la géologie locale et de la topographie.
item class observable property | Concept
label
en Macroseismic intensity
fr Intensité macrosismique
modified 17 Nov 2023 08:31:48.685
notation c_08533211
register mots clefs
status status experimental
submitter
account name edavid@ipgp.fr
name Elsa David

type register item
version info 6
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Definition

alt label
en earthquake intensity
fr Intensité d’un séisme
description
en A cumulative measure of the effects of an earthquake at a particular place at the Earth’s surface on humans and (or) structures and thus a measure of the strength of earthquake shaking. Different from magnitude, the intensity at a point depends not only on the earthquake strength (released seismic energy) or earthquake size (released seismic moment), but also on the epicentral distance, the focal depth, the position of the observation point with respect to the type of focal mechanism and its directivity, and the local site conditions. Intensity values are usually given as integer Roman numerals ranging from 0 to 12 (see intensity scales, macroseismic). Although coarse, they are a valuable complementary analogue for physical ground motion parameters, correlating best with ground velocity. Moreover, intensity of shaking, based on the assessment of real post-event damage, is a suitable site-related empirical risk estimator for scenario calibrations. See Chapter 12 of this Manual. Inten...
fr Caractérise la force d’un séisme par cotation des effets d’un séisme sur les hommes, les structures et l’environnement et cela en un lieu donné à la surface. L’intensité en un point dépend non seulement de la taille du séisme (magnitude) mais aussi de la distance au foyer, de la géologie locale et de la topographie.
exact match c e89c01b2
in scheme Vocabulaire des mots clefs
label
en Macroseismic intensity
fr Intensité macrosismique
pref label
en Macroseismic intensity
fr Intensité macrosismique
same as c e89c01b2
source GFZ
top concept of Vocabulaire des mots clefs
type Concept | observable property
was attributed to Pôle FormaTerre