Collecting and analysing seismic effects on buildings using internet forms in the context of French insurance and global warning - Archive ouverte HAL
Communication Dans Un Congrès Année : 2024

Collecting and analysing seismic effects on buildings using internet forms in the context of French insurance and global warning

Résumé

The french seismological national office, national seismic monitoring network (BCSF-Rénass) estimate macroseismic intensities in France. Magnitude and intensity are used by the French government as the main indicators of natural disasters to determine the threshold for insurance reimbursements of the citizen’s damage building. The protocol for state compensation of citizens is based on the declaration of damage to insurance companies and town halls. To estimate and ensure the reliability of the intensities produced, the BCSF-Rénass collects, by internet forms, individual and municipal macroseismic informations. The town halls are the best informed actor about the seismic effects produced on buildings. For intensities VII and above, the BCSF-Rénass activates the Macroseismic Intervention Group to carry out macroseismic field surveys. While field missions enable experts to collect and analyse construction indicators with greater reliability, gathering information from non-experts using internet forms is often complex. Indeed, for citizens and town halls alike, it is still difficult to assess the degree of damage, the seismic vulnerability, or confirmation of the concomitance of the effects with the event under study. The BCSF-Rénass thus benefits from access to fairly exhaustive information through the french insurance system. Unfortunately, the declarations made by the public often include a large number of effects prior to the earthquake, and this is increasingly the case for the recent earthquakes. One of the reasons is directly linked to global warming. The effects on buildings of the drought-rehydration mechanism of the soils can lead to biases the damage declared in the internet forms. Complementary information is a factor of complexity in the estimation protocol, but it is also a source of completeness and reliability for the final estimate. The use of multi-source information is a factor in improving the quality of intensity, but its properties need to be known precisely.
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Dates et versions

hal-04739682 , version 1 (16-10-2024)

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  • HAL Id : hal-04739682 , version 1

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Christophe Sira, Véronique Mendel. Collecting and analysing seismic effects on buildings using internet forms in the context of French insurance and global warning. European seismological commission 2024, European seismological commission, Sep 2024, Corfou, Greece. ⟨hal-04739682⟩
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