In recent decades, phenomenological methods known as Recognition ofEarthquake-Prone Areas (REPA) were set up for identifying potential sites ofpowerful earthquakes. The information on potential earthquake sourcesprovided by the REPA method is an essential part of seismic hazardassessment methodology. For the first time, we have combined global-scaleinformation on the geographic occurrence of geofluids with global-scaleinformation on earthquake occurrence, heat flow distribution, and S-wavedispersion, to gain insights into the evolution of local stress-strain fields. Wefocused on areas characterized by the occurrence of thermal waters and/or by therelease of deep-seated gases, as traced by the isotope composition of associatedhelium. We noticed that the geographic distribution of these geofluids could serveas an indirect indicator of crustal permeability anomalies generated by crustaldeformation procedures. This study proposes adding geofluids to the list offundamental geological parameters to be considered in hazard assessmentresearch.

Geofluids as a possible unconventional tool for seismic hazard assessment

Pierotti L;Facca G;Gherardi F
2023

Abstract

In recent decades, phenomenological methods known as Recognition ofEarthquake-Prone Areas (REPA) were set up for identifying potential sites ofpowerful earthquakes. The information on potential earthquake sourcesprovided by the REPA method is an essential part of seismic hazardassessment methodology. For the first time, we have combined global-scaleinformation on the geographic occurrence of geofluids with global-scaleinformation on earthquake occurrence, heat flow distribution, and S-wavedispersion, to gain insights into the evolution of local stress-strain fields. Wefocused on areas characterized by the occurrence of thermal waters and/or by therelease of deep-seated gases, as traced by the isotope composition of associatedhelium. We noticed that the geographic distribution of these geofluids could serveas an indirect indicator of crustal permeability anomalies generated by crustaldeformation procedures. This study proposes adding geofluids to the list offundamental geological parameters to be considered in hazard assessmentresearch.
2023
Istituto di Geoscienze e Georisorse - IGG - Sede Pisa
seismic hazard, thermal waters, helium isotopes, heat flow distribution, S-wave dispersion
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Descrizione: Geofluids as a possible unconventional tool for seismic hazard assessment
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/451371
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