{"entity":{"iso2":"JP","iso3":"JPN","name":"Japan","slug":"japan"},"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":"1331-01-01","value":1.0},{"date":"1410-01-01","value":1.0},{"date":"1471-01-01","value":1.0},{"date":"1485-01-01","value":1.0},{"date":"1566-01-01","value":1.0},{"date":"1596-01-01","value":1.0},{"date":"1598-01-01","value":1.0},{"date":"1606-01-01","value":1.0},{"date":"1640-01-01","value":1.0},{"date":"1663-01-01","value":1.0},{"date":"1664-01-01","value":2.0},{"date":"1707-01-01","value":1.0},{"date":"1716-01-01","value":1.0},{"date":"1717-01-01","value":1.0},{"date":"1721-01-01","value":1.0},{"date":"1741-01-01","value":1.0},{"date":"1779-01-01","value":1.0},{"date":"1780-01-01","value":4.0},{"date":"1781-01-01","value":1.0},{"date":"1783-01-01","value":2.0},{"date":"1785-01-01","value":1.0},{"date":"1789-01-01","value":1.0},{"date":"1792-01-01","value":1.0},{"date":"1797-01-01","value":1.0},{"date":"1801-01-01","value":1.0},{"date":"1803-01-01","value":2.0},{"date":"1804-01-01","value":1.0},{"date":"1816-01-01","value":1.0},{"date":"1822-01-01","value":1.0},{"date":"1826-01-01","value":1.0},{"date":"1841-01-01","value":1.0},{"date":"1846-01-01","value":1.0},{"date":"1854-01-01","value":1.0},{"date":"1856-01-01","value":1.0},{"date":"1858-01-01","value":2.0},{"date":"1867-01-01","value":1.0},{"date":"1872-01-01","value":1.0},{"date":"1874-01-01","value":1.0},{"date":"1888-01-01","value":1.0},{"date":"1893-01-01","value":1.0},{"date":"1895-01-01","value":1.0},{"date":"1896-01-01","value":1.0},{"date":"1900-01-01","value":3.0},{"date":"1902-01-01","value":1.0},{"date":"1910-01-01","value":1.0},{"date":"1911-01-01","value":2.0},{"date":"1913-01-01","value":1.0},{"date":"1914-01-01","value":1.0},{"date":"1915-01-01","value":1.0},{"date":"1919-01-01","value":1.0},{"date":"1921-01-01","value":1.0},{"date":"1923-01-01","value":1.0},{"date":"1926-01-01","value":2.0},{"date":"1929-01-01","value":1.0},{"date":"1930-01-01","value":1.0},{"date":"1931-01-01","value":1.0},{"date":"1932-01-01","value":1.0},{"date":"1933-01-01","value":2.0},{"date":"1936-01-01","value":1.0},{"date":"1938-01-01","value":2.0},{"date":"1939-01-01","value":1.0},{"date":"1940-01-01","value":1.0},{"date":"1941-01-01","value":1.0},{"date":"1944-01-01","value":3.0},{"date":"1946-01-01","value":1.0},{"date":"1947-01-01","value":2.0},{"date":"1950-01-01","value":1.0},{"date":"1951-01-01","value":1.0},{"date":"1952-01-01","value":6.0},{"date":"1953-01-01","value":5.0},{"date":"1954-01-01","value":1.0},{"date":"1955-01-01","value":1.0},{"date":"1957-01-01","value":3.0},{"date":"1958-01-01","value":1.0},{"date":"1961-01-01","value":3.0},{"date":"1962-01-01","value":1.0},{"date":"1967-01-01","value":1.0},{"date":"1969-01-01","value":1.0},{"date":"1971-01-01","value":1.0},{"date":"1972-01-01","value":1.0},{"date":"1974-01-01","value":3.0},{"date":"1976-01-01","value":1.0},{"date":"1977-01-01","value":1.0},{"date":"1978-01-01","value":1.0},{"date":"1979-01-01","value":1.0},{"date":"1983-01-01","value":1.0},{"date":"1984-01-01","value":2.0},{"date":"1986-01-01","value":2.0},{"date":"1988-01-01","value":1.0},{"date":"1989-01-01","value":2.0},{"date":"1990-01-01","value":3.0},{"date":"1991-01-01","value":1.0},{"date":"1993-01-01","value":1.0},{"date":"1994-01-01","value":1.0},{"date":"1995-01-01","value":1.0},{"date":"1996-01-01","value":1.0},{"date":"1997-01-01","value":3.0},{"date":"2000-01-01","value":1.0},{"date":"2006-01-01","value":1.0},{"date":"2011-01-01","value":1.0},{"date":"2013-01-01","value":1.0},{"date":"2014-01-01","value":1.0},{"date":"2015-01-01","value":1.0},{"date":"2016-01-01","value":1.0},{"date":"2018-01-01","value":2.0}],"summary":{"latest_period":"2018-01-01","latest_value":2.0,"max":6.0,"mean":1.37143,"min":1.0,"of":25,"rank":3,"trend":"volatile"}}