A new dataset on milling time and public perception of Cell Broadcast tsunami alerts tested along the French Mediterranean coast on 19 January 2024.

Within the study of public perception and intended declarations in case of alert, an original dataset has been completed by using an online questionnaire, with a short URL link included in mobile alert messages, tested and displayed on 19 January 2024 along the French Mediterranean coast (engaging 189 municipalities and 9 departments). The aim is to further know and understand what people do and think upon receiving Cell Broadcast alerts, that deliver an attention-grabbing message directly on the screen of mobile phones of people located in the at-risk zones. A first notification was sent in the Tsunami Evacuation Zones from 09:30 to 10:30, and a second from 10:35 to 10:50 to close the test.