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This key is used to categorize the intensity of a potential hazard. As different types of hazards have very different "scientific" scales (Richter or MMI scale for earthquakes, European scale for avalanches...), it is necessary to adopt a very simple approach allowing to categorize the potential threat posed by any type of hazard.
We thus advise for a very simple categorization of the hazard intensity, in 2 classes:
- Low intensity: a low intensity hazard is powerful enough to damage (but not to destroy) a house that would hypothetically be located on its path
- High intensity: a high intensity hazard is powerful enough to destroy a house that would hypothetically be located on its path
NB: by "house" we mean the type of habitat construction that is most commonly found in the region where the hazard is considered. The intensity is thus a value that is relative to the local environment.