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Is an Earthquake Felt Inside a Car?
Author(s)
Language
English
Obiettivo Specifico
5T. Sismologia, geofisica e geologia per l'ingegneria sismica
5SR TERREMOTI - Convenzioni derivanti dall'Accordo Quadro decennale INGV-DPC
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
3/92 (2021)
ISSN
0895-0695
Publisher
SSA
Pages (printed)
2028–2035
Issued date
February 17, 2021
Subjects
Keywords
Abstract
The analysis of how an earthquake is felt was addressed with the data provided by citizens through a website dedicated to the perception of earthquakes in Italy (Data and Resources). The analysis focused on the perception of earthquakes by observers inside both parked and moving cars. These situations were compared with outdoor ones. The felt percentage of each situation was quantified for epicentral distance ranges and European Macroseismic Scale (EMS) degree. One of the main findings was the greatest sensitivity to shaking for people inside parked cars due to resonance phenomena of the automobile–observer system. The distribution of the intensity of perception in the car was analyzed as a function of the hypocentral distance and the magnitude of the earthquake. It was possible to define the attenuation trends of these intensities. The comparison of these trends with those of the equations for estimation of response spectral ordinates allowed us to have an evaluation of the frequency values of the seismic waves that caused the vibrations felt, which were found to agree with the typical frequencies of the car–observer system, as highlighted by independent studies. The results of this analysis show the possibility to include the perception of the earthquake inside a parked and moving car among the diagnostics used in the definition of macroseismic intensity degree of the EMS.
Type
article
File(s)
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Name
How_does_an_earthquake_feel_sbarra_et_al_.pdf
Description
Open Access accepted article (emb feb-22)
Size
5 MB
Format
Adobe PDF
Checksum (MD5)
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