.mw-parser-output .hidden-begin{box-sizing:border-box;width:100%;padding:5px;border:none;font-size:95%}.mw-parser-output .hidden-title{font-weight:bold;line-height:1.6;text-align:left}.mw-parser-output .hidden-content{text-align:left}@media all and (max-width:500px){.mw-parser-output .hidden-begin{width:auto!important;clear:none!important;float:none!important))You can help expand this article with text translated from the corresponding article in Italian. (June 2021) Click [show] for important translation instructions.
Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia.
Consider adding a topic to this template: there are already 3,068 articles in the main category, and specifying|topic= will aid in categorization.
Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article.
You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Italian Wikipedia article at [[:it:Classificazione sismica dell'Italia]]; see its history for attribution.
You may also add the template ((Translated|it|Classificazione sismica dell'Italia)) to the talk page.
For more guidance, see Wikipedia:Translation.
The seismic classification in Italy (Italian: Classificazione sismica dell'Italia) is the subdivision of the territory of Italy into specific areas, characterized by a common seismic risk. Currently the seismic classification of the Italian territory into zones has remained exclusively for statistical and administrative aspects. With the legislation that came into force in 2009 (NTC08), after the earthquake that affected the city of L'Aquila, a new calculation methodology based on a point-like statistical approach is used for the purpose of anti-seismic design. Each point of the Italian territory is characterized by a precise ground acceleration value (Peak Ground Acceleration) as a function of a return time (ie a probabilistic value).
Zone 1 : high seismicity (PGA over 0.25 g), includes 708 municipalities.
Zone 2 : medium-high seismicity (PGA between 0.15 and 0.25 g), includes 2,345 municipalities (in Tuscany and Piedmont some municipalities are classified in Zone 3S, medium seismicity, which requires the calculation of the identical seismic action to Zone 2).
Zone 3 : medium-low seismicity (PGA between 0.05 and 0.15 g), includes 1,560 municipalities.
Zone 4 : low seismicity (PGA less than 0.05 g), includes 3,488 municipalities.