{"entity":{"iso2":"TO","iso3":"TON","name":"Tonga","slug":"tonga"},"indicator":{"licence":"CC BY 4.0 (Our World in Data)","slug":"number-of-tsunamis","source":"National Geophysical Data Center / World Data Service (2025) \u2013 with major processing by Our World in Data","source_url":"https://ourworldindata.org/grapher/number-of-tsunamis","title":"Number of tsunamis","unit":"events"},"observations":[{"date":"1865-01-01","value":1.0},{"date":"1892-01-01","value":1.0},{"date":"1919-01-01","value":1.0},{"date":"1948-01-01","value":1.0},{"date":"1977-01-01","value":1.0},{"date":"1982-01-01","value":1.0},{"date":"1987-01-01","value":1.0},{"date":"1997-01-01","value":1.0},{"date":"2006-01-01","value":1.0},{"date":"2009-01-01","value":1.0},{"date":"2022-01-01","value":4.0}],"summary":{"latest_period":"2022-01-01","latest_value":4.0,"max":4.0,"mean":1.27273,"min":1.0,"of":38,"rank":1,"trend":"volatile"}}