{"entity":{"iso2":"US","iso3":"USA","name":"United States","slug":"united-states"},"indicator":{"licence":"CC BY 4.0 (Our World in Data)","slug":"significant-volcanic-eruptions","source":"National Geophysical Data Center / World Data Service (2025) \u2013 with major processing by Our World in Data","source_url":"https://ourworldindata.org/grapher/significant-volcanic-eruptions","title":"Number of significant volcanic eruptions","unit":"events"},"observations":[{"date":"1540-01-01","value":1.0},{"date":"1784-01-01","value":1.0},{"date":"1790-01-01","value":1.0},{"date":"1800-01-01","value":2.0},{"date":"1819-01-01","value":1.0},{"date":"1820-01-01","value":1.0},{"date":"1823-01-01","value":1.0},{"date":"1825-01-01","value":1.0},{"date":"1840-01-01","value":1.0},{"date":"1856-01-01","value":1.0},{"date":"1866-01-01","value":1.0},{"date":"1868-01-01","value":1.0},{"date":"1877-01-01","value":1.0},{"date":"1878-01-01","value":1.0},{"date":"1883-01-01","value":1.0},{"date":"1912-01-01","value":1.0},{"date":"1919-01-01","value":1.0},{"date":"1924-01-01","value":1.0},{"date":"1934-01-01","value":1.0},{"date":"1944-01-01","value":1.0},{"date":"1957-01-01","value":1.0},{"date":"1975-01-01","value":1.0},{"date":"1980-01-01","value":2.0},{"date":"1992-01-01","value":1.0},{"date":"1993-01-01","value":1.0},{"date":"1994-01-01","value":1.0},{"date":"1998-01-01","value":1.0},{"date":"2000-01-01","value":1.0},{"date":"2008-01-01","value":1.0},{"date":"2009-01-01","value":2.0},{"date":"2010-01-01","value":1.0},{"date":"2012-01-01","value":2.0},{"date":"2014-01-01","value":1.0},{"date":"2016-01-01","value":1.0},{"date":"2018-01-01","value":3.0}],"summary":{"latest_period":"2018-01-01","latest_value":3.0,"max":3.0,"mean":1.17143,"min":1.0,"of":25,"rank":2,"trend":"rising"}}