Hai Sentito il Terremoto? (HSIT) is an earthquake information and public-participation service associated with Italy’s National Institute of Geophysics and Volcanology (INGV). It invites people to complete a questionnaire describing what they felt during an earthquake, then uses the responses to create preliminary maps of macroseismic effects. Visitors can explore earthquake events, view reported effects, and find information such as event location, time, magnitude, depth, and the number of questionnaires considered.

The site also provides recent reports, advanced search options, event details, and resources explaining the data and intensity scales, including MCS and EMS. Beyond current events, HSIT offers databases, downloads, scientific publications, historical earthquake documents, and comparisons between recent and past earthquakes. Users can learn how to cite or reproduce its data and review the site’s disclaimer.

The service connects public observations with seismic information, helping visitors contribute descriptions of their experiences while exploring how earthquake effects are reported across affected areas. It also directs users to INGV and other seismological organizations